Pretty Little Liars is a new ABC Family original series about five best friends and their life in a seemingly idyllic community. Until the night Alison goes missing. And then Aria, Hanna, Spencer and Emily start to receive messages from the anonymous "A" who knows all of their secrets. Suddenly, their picture-perfect world begins to unravel as lies and betrayal threaten everything they hold dear. . . including their lives. Based on the popular book series, Pretty Little Liars by Sara Shepard.
Let's find out who the mysterious "A" is on Pretty Little Liars!