Characters

Aria Montgomery
Aria Montgomery (Lucy Hale) moves back to Rosewood with her mother Ella, father Byron, and younger brother Mike after an extended absence in Europe following Alison's disappearance. Aria begins a romance with a man who turns out to be her new English teacher, Ezra Fitz. She immediately receives a message from "A" taunting her about the secret romance. Aria and Ezra struggle with the forbidden nature of their relationship as Aria is tormented by keeping the secret of her father's past affair from her mother. As she decides what to do with the information, she finds that "A" has beaten her to it in a tell-all letter to Ella. As her family starts falling apart, Aria runs to Ezra's apartment to find him not there. After Ezra leaves, she becomes romantically involved with a student, Noel Kahn. As things turn out great between her and Noel, Ezra returns. Troubles arise as she is caught in a love triangle, with Noel and Ezra. She chooses Ezra and one night while kissing Ezra in his car, Noel sees this and blackmails Ezra for good grades. Once Aria discovers this, she cuts things off with Noel. In more recent episodes, Aria has been having trouble maintaining her relationship with Ezra a secret, especially after accidentally sending a romantic text to her mom meant for Ezra. In the latest episode, Aria leaves Ezra's apartment only to been seen by Garrett who pays Ezra a visit and says, "Let's talk about one of your students..." Luckily, he was only there to talk about Spencer and what's been going on lately with the investigation. Ezra got a transfer to Hollis College so he is no longer Aria's teacher so he says that they can have a public relationship and the couple are ecstatic about this. Until later on, Aria finds out that Ezra did not divulge information that he and his ex fiancée, Jackie, were going to be teaching together at Hollis College. Aria saw this as a betrayal by omission. They are talking in her room and she walks out leaving him standing there and leaving us unclear about where their relationship stands.

Hanna Marin
Hanna Marin (Ashley Benson) has taken Alison's place as the most popular girl at Rosewood in Alison's absence. Previously chubby, Hanna became slimmer after Alison's disappearance, and now shoplifts. Rejected by her boyfriend, a distraught Hanna crashes his car into a tree, later working at a dentist's office to pay off her debt. In the mid-season finale, Hanna is hit by a car as she runs to tell the girls who "A" is. After recovering from the injuries, Hanna throws a party to find that someone had stolen from her house and that Lucas was the person who had destroyed Alison's memorial. Hanna has a hard time trying to accept the fact that Aria is seeing Ezra. She becomes closer with a known bad boy Caleb, and once discovering that he more or less lives in the school offers her basement to him. When Hanna's mother almost catches Caleb in their home, Hanna has to jump in a shower with him, making their relationship very awkward. However, they "solve" this problem by making out in the end of the episode. In the next episode, they start dating and this fact comes to her mother attention, who finds out that Caleb has been sleeping in the basement and kicks him out. Hanna goes with him to camp somewhere in the forest, and they bond, watching the campfire. Caleb tells her the truth about his father and later, they sleep together. Things afterward seem to be going perfect, however, once discovering the real reason why Caleb was hanging around her - to spy on her for information for Jenna - she is infuriated and breaks up with him kicking him out of her house and refuses to talk to him. At the end of the latest episode, Aria tells Hanna to go to Caleb who is boarding the bus but she refuses and walks away. Caleb seeing this boards the bus to Arizona. Later on, Caleb calls Hanna but she left her phone on the table so Mona picked it up and Lucas overhears about the letter that Mona did not give to Hanna. So although he wants to be with Hanna he realizes that Caleb will make her happy and in the last episode we see that he is driving in his car and Caleb is in the passenger seat and they on there way from Arizona to their hometown.

Emily Fields
Emily Fields (Shay Mitchell) is a competitive swimmer. She befriends Maya St. Germain, the new resident of Alison's former home. Maya introduces Emily to marijuana, and the girls grow closer. A message from "A" reveals Emily to be curious about her sexuality, and hints that she had kissed Alison in the past or had been in a relationship with Alison. Emily's mother invites Maya to stay for a while, and she and Emily share a room and a bed. Emily's boyfriend becomes possessive and almost forces her to have sex with him, but she is saved by Toby. Emily breaks up with her boyfriend and kisses Maya in a photo booth at a party; someone steals the photograph and makes copies. Emily goes with Toby to Homecoming, much to the shock of her friends, who believe Toby is dangerous. Emily begins to feel the same way, but Toby brings her to the hospital after she is knocked out trying to flee from him. Emily eventually pursues a relationship with Maya after Toby runs away. During the mid-season 1 premiere, she reveals to her father that she is gay. When the season started again, it is revealed that someone has sent those photos to her mother, presumably the infamous "A" making things "Sub-zero' between the two. Recently, after Maya was sent away by her parents, Emily has returned to the swim team but makes an enemy with competitive swimmer Paige who sees Emily as a threat. But one night Paige shows up in the pouring rain at Emily's front door and gives a tearful apology to Emily before taking off. From there on out things are more cooled between the two. In the episode "The New Normal", Emily is getting into her car and Paige abruptly appears, kisses her, and says "Don't tell", before running back to wherever she came from. They secretly start going out but once Emily realizes that Paige is not willing to come out, she says to stay friends. Then Paige decides to be more open about her sexuality and agrees to meet a girl from some sort of faith group called Samara. She asks Emily to come along for support but Paige does not show up at the meeting. In the end Samara and Emily become friends and Paige is jealous of this. There are some hints that Samara might be gay like Emily and we are not sure if they will start a relationship but Samara's character returns in the second series.

Spencer Hastings
Spencer Hastings (Troian Bellisario) lives with her family's expectations looming over her head. Spencer's newly-engaged and condescending sister, Melissa, moves into the guest house which Spencer had been fixing up for herself. Spencer finds herself increasingly attracted to her sister's fiancé, Wren, whom "A" warns Spencer not to kiss or "A" will tell. Spencer and Wren do kiss and are caught by Melissa, who insists that Wren move out. Spencer starts dating a worker at the country club to which her family belongs, and later hides from her friends the news that her mother has breast cancer. Her field hockey coach is her sister's ex-boyfriend, Ian, who both Ali and Spencer had a crush on. Spencer and Ali were always competing. For example, Ali was on the Varsity team in 7th grade and Spencer wasn't. In the beginning of the series, Spencer was against Emily hanging out with Toby but eventually grew to like him and has been spending more and more time with him. In "A Person of Interest", they spend time together in a motel room, as seen as Spencer's parents have a hard time understanding her connection with Ali's murder. Spencer and Toby play scrabble, sleep in the same bed and eventually kiss near the end of the episode. In the following episodes, Spencer, after suspicion continues to take a toll on her, is told to stay away from Toby for her own good. She then makes an arrangement to see him in private at the town's festival, only to be sent a fake text (presumably from "A") telling her to meet Toby in the clown house. When she enters, she is locked into a small space. She is found by Ian, her mother, and her sister and when leaving she sees Toby and almost leaves without speaking to him, but she then rushes to him, hugs him and kisses him in front of her shocked family. Later on, she anonymously tells Ian to meet them in the woods with money as they say that they know his secret. However, Spencer and Melissa get into a car accident and Melissa is stuck in the hospital. Spencer goes to the church to get Melissa's phone as she left it there and Ian is in the church waiting. She starts running upstairs and Ian tries to attack her but a mysterious figure appears (A?) and pushes Ian off the side and he falls and dies. The rest of the girls arrive having been to the forest, and see the dead body and they call the police. Later on when the police arrive they go in and the body is not there, leaving the rest of the town to think that the girls are liars.

Alison DiLaurentis
Alison DiLaurentis (Sasha Pieterse) was the former leader of Rosewood's premiere clique. Ruling the group with an iron fist, the vicious but charismatic Alison had gone missing during a slumber party; a year later, her disappearance was still unsolved. When Aria, Hanna, Spencer, and Emily begin receiving threatening messages from "A" reminding them of their darkest secrets, they suspect that "A" is Alison, in whom they had all confided. But, Alison's body is soon discovered buried in her former backyard. It is revealed (by a video "A" sent the girls on Spencer's computer) that Alison may have had a relationship with Melissa's brand new husband, Ian, and that Ian might have been the one who killed her. It is revealed during a flashback that Ali and Emily kissed. Emily had strong feelings for Ali, but Alison didn't feel the same, saying, "I like boys, Emily. And trust me, if I'm kissing you, it's because I'm practicing for the real thing." She also pressured the girls into doing things, like going along with her when she exploded Toby's garage. Ali was also with Aria when she saw Meredith and Byron kissing. Alison comforted Hanna when Hanna binged on eating a whole pie. She said, "I can teach you how to make it go away" which meant that she taught Hanna how to make herself throw up. She taunted Lucas, and broke up Noel and his girlfriend, saying that she did it for Aria since she had a crush on him. "I only kill when we need food," she said. "Or when I'm bored."

"A"
"A" is the main antagonist in the series. From the opener, "A" sends messages to Aria, Emily, Hanna and Spencer taunting them about knowing all their secrets and plans to make their lives miserable, as Alison and they had made everyone else's lives miserable. At first, the girls suspected Alison as "A", but her corpse was unearthed in her backyard. The most possible suspect is Jenna Marshall, who was a victim of Alison's prank. With Jenna's vindictive tendencies, she could be "A". During the Midseason One Finale, while Ezra and Aria were in the car, Noel Kahn wrote "I see you" on the back of Ezra's car, prompting Hanna to believe Noel is "A". The girls continually think Noel was "A", possibly but "A" also went to great lengths to destroy any evidence, like cutting down a tree that had "Alison + Ian" carved on it. However, "A" has also done good things for the Liars, such as saving Ezra and Aria's relationship by framing Noel for cheating on midterms. Although "A" did some good, "A" decides to blackmail Hanna into doing things she doesn't want to do, like torture Lucas and almost ruin Aria and Ezra's relationship. In return, "A" gives her money, to help combat the financial difficulty that her and her mother are going through. In the season one finale "For Whom the Bell Tolls", "A" saves Spencer from dying by pushing Ian off the ledge near the bell in the church while he was trying to push her to her death, prompting Ian to be hung by the ropes of the bell. When the police come, however, Ian's body is nowhere to be found, and neither is "A".

Acquaintances of Aria Montgomery
The following characters are all family members and acquaintances of Aria Montgomery, one of the protagonists of the series.

Ella Montgomery
Ella Montgomery (Holly Marie Combs) is Aria's stay-at-home mother. Ella unknowingly befriends Byron's former mistress, a student named Meredith. The relationship between Byron and Ella is strained after Ella reads a letter from "A" revealing Byron's affair.

Byron Montgomery
Byron Montgomery (Chad Lowe) is a history professor. Aria is aware that her father had cheated on Ella a year before; Byron regrets the affair, and Aria struggles with keeping the secret from her mother to protect her. Ella unknowingly befriends Byron's former mistress, a student named Meredith. The relationship between Byron and Ella is strained after Ella reads a letter from "A" revealing Byron's affair. Bryon goes too far when he thinks that Ezra is going out with his wife to a poetry place; however he soon finds out that other teachers are going there and he apologizes to Ezra.

Mike Montgomery
Mike Montgomery (Cody Christian) is Aria's younger brother who has some anger issues. He doesn't want to admit that he knows about his father's affair and when his mother finds out, Mike completely goes into an anger spiral.

Ezra Fitz
Ezra Fitz (Ian Harding) is the new English teacher in Rosewood who becomes romantically involved with Aria the day before she appears in his class. They try to resist their attraction, but fail. Their relationship is discovered by Noel Kahn who writes 'I See You' on the windshield of Ezra's car. Informed about the affair between Ezra and Aria, Noel attempts to blackmail him by demanding a better grade on an English essay, or taking the relationship to the principal. In one episode he tells Aria that nothing anybody says can change what he feels for her. In the last few episodes of season one, it is revealed that Ezra was engaged last year and the woman broke it off. In the season finale, the woman comes and reveals she is a teacher at Hollis, a college nearby where Aria's dad teaches. Ezra was going to teach there. Aria was thought to have broken off their relationship by saying "Up until now you were the only boy who has never lied to me." In the second episode of season two they make up with a passionate kiss right before he leaves the high school for the last time. Aria currently goes to some classes at Hollis mostly because she gets to see him.

Noel Kahn
Noel Kahn (Brant Daugherty) is Sean's friend. He likes Aria, and briefly dated her, but tried to blackmail Ezra when he witnessed him and Aria together in a car in the woods. Noel attempted to blackmail Ezra with knowledge of his relationship with Aria in exchange for getting a better grade on an English assignment. Ezra refused to change his grade. Before Noel could expose Aria and Ezra's relationship, he was suspended from school for stealing mid-term exams and was seemingly framed by "A." He returns to school at the beginning of season 2, and is revealed to be dating Mona.

Meredith Sorenson
Meredith Sorenson (Amanda Schull) was the mistress of Byron Montgomery. Aria and Alison witnessed Meredith and Byron kissing passionately in Byron's car. Byron and Meredith started living together after Byron and Ella decided to divorce.

Simone
Simone (Alona Tal) was Aria's babysitter, she became a journalist in New York. She flirted with Ezra Fitz, but he was not interested because he loved Aria too much.

Jackie Molina
Jackie Molina (Paloma Guzman) is Ezra Fitz's ex-fiancée,' who, like Ezra, is also teaching at Hollis. At first, Aria is threatened by the thought of Ezra almost marrying Jackie, but then Ezra reassures her he only has eyes on her. Aria even friended Jackie on the Internet, posing as a past classmate, but then defriended her after she accepted. Jackie first appears at the party Byron throws for his fellow college faculty. Jackie looks surprised when she sees Ezra kissing Aria on campus. She meets Aria and Ezra together again in "The Devil You Know," when Jackie comes to inform Ezra that the department won't be needing his space after all. Jackie calls Ezra by a special nickname, perhaps in an attempt to make Aria jealous and feel lame for calling him Mr. Fitz.

Acquaintances of Hanna Marin
The following characters are all family members and acquaintances of Hanna Marin, one of the protagonists of the series.

Ashley Marin
Ashley Marin (Laura Leighton) is Hanna's workaholic mother, who is raising her daughter on her own. Abandoned by Hanna's father, Ashley recognizes Hanna's wild behavior as a cry for attention. Warning her daughter that any indiscretion in their small town can humiliate them, Ashley avoids Hanna being charged for shoplifting by sleeping with the arresting officer. Even though Hanna's father and she are no longer together, Ashley longs to get him back. When Ashley finds that she and Hanna are in debt she steals money from a client at the bank she works for telling Hanna that she is going to replace it by the end of the year; the money is later stolen by "A" at a party at Hanna's house thrown by Mona.

Tom Marin
Tom Marin (Roark Critchlow) is Hanna's father. He left hanna and her mother after Allison's death and is now engaged to a woman named Isabel.

Sean Ackard
Sean Ackard (Chuck Hittinger) was originally Hanna's crush before Alison disappeared, back when Hanna was still, "Hefty Hanna". They began dating sometime after her disappearance. Hanna's anger and embarrassment at Sean's refusal to have sex drives her to steal his car and ultimately crash it. Sean forgives Hanna and reveals that he is a member of the virginity club RLW, "Real Love Waits." Hanna and Sean get back together, but nothing is ever the same with them. After the mid-season finale, Sean gets into an intense fight with Lucas when Lucas thinks she deserves a better boyfriend. Sean later breaks up with Hanna after she dances with Lucas.

Lucas Gottesman
Lucas Gottesman (Brendan Robinson) is a social outcast who begins to form a friendship with Hanna, for whom he secretly had feelings for until they were revealed while he was visiting Hanna in the hospital after her accident. Lucas tells Hanna that it was him who destroyed one of the memorials dedicated to Ali as a result of anger of all the things Ali had done to him in junior high. Despite her anger with him, Hanna keeps his secret, and still wants to be friends with him. At Hanna's party, Lucas picks a fight with Sean after seeing Hanna with him. Later in the season at the school dance, "A" forces Hanna to torture Lucas by dancing with him making him express his feelings to her, to once again be denied. Emily eventually confronts Hanna about messing with Lucas, but Hanna tries to plead about how she doesn't want to ever hurt Lucas. In the season one finale, Lucas decides to do the right thing and not play Mona's game, finding Caleb and deciding to bring him to Hanna so they can talk. In Season 2, Hanna tries to help Lucas find a new love interest. Lucas' new love interest Danielle likes him but suspects Hanna still does too and she is trying to make Lucas jealous by hanging out with Caleb on Lucas and Danielle's first date.

Mona Vanderwaal
Mona Vanderwaal (Janel Parrish) is a former social outcast who longed to be accepted into Alison's group. In the year since Alison's disappearance, Mona has transformed herself into a popular social leader alongside Hanna. Mona is also afraid when Hanna suddenly acts strange, and insists that she stop before they both become unpopular again. Hanna will always still be friends with Mona, but now is best friends with Aria, Emily, and Spencer, who had all previously gone their separate ways after Alison's disappearance. Mona disapproved of Hanna's relationship with Caleb and when he drops off a letter meant for Hanna, Mona tears it up and throws it in the trash. Hanna finds out and is mad at her. She also starts dating Noel which makes Hanna unhappy.

Caleb Rivers
Caleb Rivers (Tyler Blackburn), a 'bad boy' and Hanna's love interest. At first, Hanna seems to find him annoying and "sketchy" but their hatred grows to friendship once Hanna starts getting to know him. Once the school found out he had been living there, Hanna offered for him to take residence in her home. He stayed in Hanna's basement and lived in her home having to hide from her mother constantly. As he started living in Hanna's home, she found herself falling in love with him, their friendship growing stronger. When she found herself caught in the shower with him, however, she started treating him differently, ignoring him, since she was nervous after seeing him in the shower. Later though when Caleb is packed to move out of her home after the way she has treated him, they admit their feelings towards each other and kiss. The morning after this, Caleb kisses Hanna on the neck and nearly gets caught by her mother, luckily being able to sneak out and come back in for a few more kisses with Hanna. Not too long after, however, Hanna's mother catches Caleb and her kissing and him living in their home and kicks him out, enraging Hanna at her mother. She decides to go and camp out with him in which that night Hanna looses her virginity to him. He leaves Hanna's home once she finds out he had been spying on her for Jenna although he does have feelings for her and quit the job once he realized it. He also states that he hadn't known Hanna at the time when he started the job and needed the money since he was homeless and tells Jenna off once he is together with Hanna. After failing at getting Hanna's forgiveness, he decides to leave Rosewood to go to Arizona, where he thinks he could find his mother, whom he never met since he was small, and she left him with his aunt. Before he leaves, he writes a letter to Hanna in which he is determined to get to her and gives it to Mona, who rips up the letter and spills a drink all over it. Hanna is left believing Caleb never loved her, although we find that the letter says he does, and lets him leave Rosewood without saying goodbye. In the season one finale, Lucas finds Caleb after realizing Hanna never got the letter, and picks him up to take him to Hanna because he wants her to be happy.

Darren Wilden
Darren Wilden (Bryce Johnson) was the detective investigating Ali's murder, who continually questions the girls and takes advantage of Hanna's mother. He leaves the case when Veronica Hastings finds him question the four girls, who are all minors, without an adult present, and threatens to get him kicked of the force.

Acquaintances of Emily Fields
The following characters are all family members and acquaintances of Emily Fields, one of the protagonists of the series.

Pam Fields
Pam Fields (Nia Peeples) is Emily's mother, who has a hard time accepting Maya and Emily's relationship. She goes through Maya's backpack and finds joints. She then asks Emily if she's stoned, which she isn't. One night after having dinner with her family and Maya, Emily thanks her mother for being supportive and accepting her sexuality, Pam says that she's "not okay with it" and the "whole thing disgusts me." She shows the drugs to Maya's parents, and she gets sent to juvie. Emily says it won't change the way she feels about Maya but Pam says she is disappointed in her. Emily responds to her by saying "for the first time in my life, I am ashamed that you are my mother."

Wayne Fields
Wayne Fields (Eric Steinberg) is Emily's father, currently stationed at Fort Hood, Texas. He came home on leave to meet Maya for the first time. He was at first against Emily and Maya's relationship, but he never stopped loving Emily and tolerated it for her sake. After a few weeks, he gets called back to active duty.

Ben Coogan
Ben Coogan (Steven Krueger) is Emily's boyfriend at the beginning of Season 1. She begins to avoid him as she develops feelings for Maya.

Maya St. Germain
Maya St. Germain (Bianca Lawson) is Emily's girlfriend. They have very strong feelings for each other; Emily is drawn to Maya, no matter what her parents say. Emily goes out with Toby Cavanaugh but goes back to Maya when he runs away. After Emily's mother found marijuana in Maya's backpack, she calls Maya's family and the police arrest her for drug possession, and was sent away to a religious camp called "True North" for three months. Before she left, the girls arranged Emily and Maya to meet at Spencer's house for a tearful get-together. When Emily tries to contact Maya at True North she reaches her director who will not let them communicate. But Emily gets Caleb to mess with her phone, so they can now talk to each other.

Paige McCullers
Paige McCullers (Lindsey Shaw) took over as captain of the swim team in Emily's absence. She becomes jealous that Emily is attempting to take her spot as captain and bashes her with gay slander. When she realizes the error of her way, she apologizes to Emily in the middle of the night, having an accident right after. After her father comes to the school to complain about the injustice that Paige is getting, Paige admits to Emily that her life isn't easy either: she is gay as well. Paige kisses Emily in a car and asks her not to tell, leaving Emily shocked. They secretly start going out but once Emily realizes that Paige is not willing to come out, she says to stay friends.

Samara Cook
Samara Cook (Claire Holt) is a new friend of Emily who tried to help Paige with her coming out to her father. When her and Emily are caught flirting at the festival, Paige gets jealous and mad, ending up Emily thanking Samara and telling Paige it's not worth it.

Acquaintances of Spencer Hastings
The following characters are all family members and acquaintances of Spencer Hastings, one of the protagonists of the series.

Peter Hastings
Peter Hastings (Nolan North) is Spencer and Melissa's father who is all about winning, and being the best. The picture perfect life, with the not so picture perfect daughter.

Veronica Hastings
Veronica Hastings (Lesley Fera) is Spencer's and Melissa's mother. In "The Perfect Storm" Spencer discovers her mother had breast cancer and was keeping it a secret from the rest of the family because their, "family doesn't handle imperfections well."

Melissa Hastings
Melissa Hastings Thomas (Torrey DeVitto) is Spencer's older sister, who was engaged to Wren. Melissa is the family's "perfect child", and treats Spencer cruelly. When she catches Wren kissing Spencer, she demands he move out. When her previous boyfriend, Ian, returns, she is reluctant to see him, but they end up happily eloping in the winter premiere "Moments Later". They also quietly marry, much to Spencer and her mother's shock. It is revealed in "Know Your Frenemies" that she is trying to get pregnant with Ian. It was supposed to be kept a secret but Spencer saw an ovulation kit belonging to Melissa. When Spencer asks why she wants to be pregnant, Melissa says she always wanted a big family. However, she never mentioned this in her life. She also said that winning and getting her way wasn't important to her anymore, even though Spencer said "but you wanted those things last WEEK!" Spencer promises to keep the secret, but she tells Hanna when they're at school. Melissa then gets pregnant which worries her sister. In the season one finale, Spencer and Melissa get into a car crash, and doctors are unsure of whether or not Melissa's baby will make it, but it is revealed the baby survived. After being upset at Spencer, she asks her to tell about Ian and tells her sister he 'was excited for them to become parents' and they pick out a name, Taylor. Later, a figure seeming to be Ian contacts Melissa, but when Spencer gets a hold of Melissa's phone, she asks "Ian" what he and Melissa are going to name the baby, to which the person replies Taylor. Melissa is the one who discover Ian's dead body in "Blind Dates"

Ian Thomas
Ian Thomas (Ryan Merriman) is Melissa Hastings's former boyfriend, who had kissed Spencer. He elopes with Melissa in the mid-season 1 premiere. He also cheated on Melissa with Alison, when she was still alive. He was in a video shot by Alison before she went missing. "A" managed to show the girls the entire video of Ian apparently choking Alison to death. In the season finale he is killed on top of the church bell tower by "A". However, when the police go in to retrieve the body, his corpse is nowhere to be found. From the season 2 episode one "It's Alive", it can, however, be argued that Ian is still alive. At the end of "Blind Dates", Ian was found dead with blood on his head and a gun in his hand. With a letter by his side saying he killed Ali, and he lost his temper. But it is also revealed that "A" was there at the place where Ian is believed to have killed himself.

Wren Kim
Wren Kim (Julian Morris) was engaged to Melissa, until he develops feelings for Spencer. Melissa calls off the engagement, and kicks Wren out when she catches him kissing Spencer. He then apologizes to Spencer for making a mess between her and Melissa, and tells Spencer that he wishes that he met her first. As of Season 2 he has been giving pain killers to Mellisa for Ian. But Spencer finds out and demands his help. Together they end up finding Ian- DEAD.

Alexander 'Alex' Santiago
Alex Santiago (Diego Boneta) was Spencer's new love interest, who works at her family's country club. Spencer asks Alex to homecoming, but ignores him most of the night, and Alex leaves early after Melissa tells him that Spencer only invited him to anger their father. Alex eventually forgives her, and they continue their relationship. Later in the series a friend of his from the country club gave him a brochure for a tennis clinic in Sweden where almost everyone who enters it gets to play in the Swedish Open. When he tells this to Spencer, she persuades him to go but he declines because he's not interested in playing pro instead he would rather work and earn up for college. "A" used the situation to drive a wedge between him and Spencer; he walks out on her after Hanna's homecoming party.

Acquaintances of Alison DiLaurentis
The following characters are all family members and acquaintances of Alison DiLaurentis, one of the protagonists of the series.

Jason DiLaurentis
Jason DiLaurentis (Parker Bagley) is Alison's brother who is somewhat creepy, and keeps secrets. In If At First You Don't Succeed, Lie, Lie Again it is revealed he used to smoke pot, and hang out with Ian Thomas during the summer.

Jessica DiLaurentis
Jessica DiLaurentis (Andrea Parker) is Alison's mother, she appeared in the first episode when Alison's body was found. She returns to Rosewood to help out with a fashion show being held in Alison's honour.

Kenneth DiLaurentis
Kenneth DiLaurentis is Alison's father.

Jenna Marshall
Jenna Marshall (Tammin Sursok) is Toby's younger stepsister, Jenna lost her sight due to a prank played by Alison, intended for Toby. The girls suspect Jenna to be the mysterious "A." During season 1 she was revealed to have a sexual relationship with Toby prior to losing her sight. Jenna's vindictive nature doesn't end with the girls, but also Toby as well, for trying to inadvertently assist them. In the episode "The New Normal", Toby reveals that Jenna was actually scared of Alison and her posse even though she was always putting up an intimidating face. In "Someone to Watch Over Me" she asked Caleb to hack into Hanna's phone, but he did not that as he downloaded "junk", but Hanna found out and broke up with him. Later in the bathroom Hanna slaps her across the face so badly her glasses came off.

Toby Cavanaugh
Toby Cavanaugh (Keegan Allen) is Jenna's stepbrother. Ali had planned getting rid of Toby with a stink bomb to the garage, but he and Jenna were having sexual relations at the time, so it ended up blinding Jenna; he knows the girls were behind it, but took the blame when Ali threatened to reveal that he was having sexual relations with Jenna. He is interested in Emily and attempts to get closer to her, saving her from near rape by her boyfriend Ben. At homecoming, Emily gets a text from her friends saying Toby was Ali's murderer. She runs away, injuring herself and Toby. Toby drives her to the hospital, leaving immediately afterwards. The police find his wrecked motorcycle. In "Keep Your Friends Close", Toby is wrongly charged with Alison's murder and taken into custody. Soon after, the town's district attorney is forced to drop the charges because of tainted evidence. Emily and Toby's friendship cools after Toby realizes that they won't be romantically involved (because of Emily's interest in Maya), and because he believes she is responsible for informing the police to his whereabouts. During the end of season one, Toby becomes closer with Spencer. The two bond over accusations in Alison's murder against both of them. They become romantically involved towards the end of season one and into season two, but they're forbidden to see each other. Spencer goes against her parents demands and continues seeing Toby. In "My Name Is Trouble" Spencer buys Toby the truck he was saving up for so he can quit his job with Jason DiLaurentis and get away from his parents. This results in the two of them kissing and pledging their love each other for the first time.

Garrett Reynolds
Garrett Reynolds (Yani Gellman) is a police officer investigating the case of Allison DiLaurentises' death. He claims to believe that Spencer is innocent and that he is on the girls side even though he is not allowed to have personal opinions while in uniform. He is supposed to trail Spencer while she is a person of interest in the case. In "Monsters in the End", he sees Aria walking out of Ezra Fitz's apartment. In "For Whom the Bell Tolls", Garrett is revealed to be in a secret relationship/alliance with Jenna.

Anne Sullivan
Anne Sullivan (Annabeth Gish) is a mysterious therapist, who helps the girls deal with their seemingly obsessive thoughts about pinning Alison's murder on Ian.