Watch your back.
Cady Heron is a hit with The Plastics, the A-list girl clique at her new school, until she makes the mistake of falling for Aaron Samuels, the ex-boyfriend of alpha Plastic Regina George.
Lindsay LohanCady Heron
Rachel McAdamsRegina George
Lizzy CaplanJanis Ian
Lacey ChabertGretchen Wieners
Amanda SeyfriedKaren Smith
Daniel FranzeseDamian
Jonathan BennettAaron Samuels
Rajiv SurendraKevin Gnapoor
Tina FeyMs. Norbury
Tim MeadowsMr. Duvall
Ana GasteyerCady's Mom
Neil FlynnCady's Dad
Amy PoehlerMrs. George
Dwayne HillCoach Carr
Diego KlattenhoffShane Oman
