Trailer
Cast
Nicole Crimi
Kylie George
Jonathan Malen
Kristen's Boyfriend
Miranda Edwards
Michigan Girl
Wai Choy
Mathlete Tim Pak
Ana Gasteyer
Cady's Mom
Jonathan Bennett
Aaron Samuels
Jack Newman
History Teacher
Olympia Lukis
Jessica Lopez
Kristen Bone
Short Girl
Andreja Punkris
Animal Dancer
Sharron Matthews
Joan the Secretary
Bruce Hunter
Mathlete Moderator
Tim Meadows
Mr. Duvall
Amy Poehler
Mrs. George
Lindsay Lohan
Cady Heron
Daniel Franzese
Damian
David Reale
Glenn Coco (uncredited)
Ely Henry
Homeschooled Boy
Lizzy Caplan
Janis Ian
Stefanie Drummond
Bethany Byrd
Diego Klattenhoff
Shane Oman
Clare Preuss
Caroline Krafft
Rachel McAdams
Regina George
Lacey Chabert
Gretchen Wieners
Dan Willmott
Mr. George
Krysta Carter
Wannabe (uncredited)
Dwayne Hill
Coach Carr
Elana Shilling
Spelling Girl
Amanda Seyfried
Karen Smith
Ky Pham
Trang Pak
Daniel DeSanto
Jason
Chris Anton
Huge Guy
Jill Morrison
Crying Girl
Les Porter
Chemistry Teacher
Tina Fey
Ms. Norbury
Jan Caruana
Emma Gerber
Erin Norah Thompson
Dawn Schweitzer
Molly Shanahan
Kristen Hadley
Eve Crawford
English Teacher
Jordan Dawe
Animal Dancer
Neil Flynn
Cady's Dad
Rajiv Surendra
Kevin Gnapoor
Alisha Morrison
Lea Edwards
Julia Chantrey
Amber D'Alessio
Laura de Carteret
Mrs. Wedell