Ashley Benson is Hanna. She was in Bring It On: In It to Win It, Fab Five: The Texas Cheerleading Scandal, was on Days of Our Lives, and she was a Six Chick in 13 Going on 30.
Lucy Hale is Aria. She was on Wizards of Waverly Place, The Sisterhood of the Traveling Pants, Privileged, and Bionic Woman (the failed remake).
Emily is Shay Mitchell. She was in an episode of Rookie Blue and Degrassi: The Next Generation.