Cady Heron (Lindsay Lohan) 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 (Jonathan Bennett), the ex-boyfriend of alpha Plastic Regina George (Rachel McAdams) in this comedy written by and starring Tina Fey. Also starring Amy Poehler, Tim Meadows, Ana Gasteyer, Amanda Seyfried, Lizzy Caplan, and Lacey Chabert.