Based on the Pretty Little Liars series of young adult novels by Sara Shepard, the series follows the lives of four girls — Spencer, Hanna, Aria, and Emily — whose clique falls apart after the disappearance of their queen bee, Alison. One year later, they begin receiving messages from someone using the name "A" who threatens to expose their secrets — including long-hidden ones they thought only Alison knew.
Lucy Hale
as Aria Montgomery
Troian Bellisario
as Spencer Hastings
Ashley Benson
as Hanna Marin
Shay Mitchell
as Emily Fields
Sasha Pieterse
as Alison DiLaurentis
Ian Harding
as Ezra Fitz
Tyler Blackburn
as Caleb Rivers
Janel Parrish
as Mona Vanderwaal
Andrea Parker
as Mary Drake
