Byron Montgomery

Byron is Aria and Mike Montgomery's father and the husband of Ella Montgomery. Byron had an affair with one of his students, Meredith Gates, a year before. Aria and Alison are aware of this, since they saw him and Meredith in the back of a car. Ella is not aware of this. After Alison's disappearance, Byron and his family went on a sabbatical. When they returned, Aria became suspicious that he was seeing Meredith again. He portrayed by Chad Lowe.