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Alison DiLaurentis

Played by: Sasha Pieterse in Pretty Little Liars

Alison DiLaurentis (Sasha Pieterse) lived in Rosewood, Pennsylvania and was the Queen Bee of the Rosewood High School social scene. She is the daughter of Kenneth and Jessica DiLaurentis and the younger sister of Jason DiLaurentis. Alison disappeared during a slumber party and her body was not discovered. Before she was presumed dead, Alison was best friends with Emily, Hanna, Spencer and Aria. While she was alive, Alison was very cruel to her friends often preying on their insecurities and secrets. When an elusive figure named A starts tormenting Emily, Hanna, Spencer and Aria, they fear that A is actually Alison. Ambitious and beautiful, Alison was the envy of every student. Boys wanted to date her and girls wanted to be her. She could be vindictive and very manipulative. However, her parents and most people saw her as the sweet girl she pretended to be. Source: IMDB