Bethany Young is an antagonist in the television series "Pretty Little Liars".
Bethany was a patient at Radley Sanitarium and is revealed as both the girl buried in Alison's grave and the murderer of Marion Cavanaugh.
As a child, Bethany was good friends with a patient named Charles, who had a liking for dresses which Bethany seemed okay with.
One night, Bethany and Charles were sitting on the roof, with Charles dressed in a yellow dress. Marion Cavanaugh entered the roof and Charles feared what would happen if she saw him so he asked Bethany to help him. Bethany agreed to distract her, but she and Marion began arguing for unknown reasons and Bethany pushed Marion off the roof. Charles was horrified by this action and asked her what she just done. However, Bethany decided to blame the whole incident on Charles and she was believed.
Eventually, Charles became Charlotte and she and Bethany became enemies. Charlotte's mother, Jessica DiLaurentis, at some point began an affair with Bethany's father and Bethany lost it when she found out. She stole Charlotte's yellow top and snuck out of Radley to go harm Jessica. Bethany broke into the DiLaurentis residence with the intent to kill Jessica. However, Mona Vanderwaal was also at the house, with the intent to harm Alison. Mona mistook Bethany for Alison, and hit her with a shovel. This didn't kill her but it severely wounded her and left her unconscious. Mona blackmailed Melissa into going to the house, where she saw Bethany's body. Melissa thought that Spencer had killed her, so she buried her, not knowing she was still alive. This suffocated Bethany to death.Bethany's body is discovered many years later and was misidentified as Alison for quite some time until it is revealed that Alison is alive.