Rachel McAdams Regina George
Amanda Seyfried Karen Smith
Lacey Chabert Gretchen Wieners
Lizzy Caplan Janis Ian
Lindsay Lohan Cady Heron
Tim Meadows Mr. Duvall
Tina Fey Ms. Norbury, Screenplay
Jonathan Bennett Aaron Samuels
Amy Poehler Mrs. George
Mark Waters Director
Ana Gasteyer Cady's Mom
Diego Klattenhoff Shane Oman
Daniel Franzese Damian
Neil Flynn Cady's Dad
Lorne Michaels Producer
Eve Crawford English Teacher
Brandt Gordon Art Direction
Laura de Carteret Mrs. Wedell
Ely Henry Homeschooled Boy
Rajiv Surendra Kevin Gnapoor
Jonathan Malen Kristen's Boyfriend
Patricia Cuccia Set Decoration
Jill Morrison Crying Girl
Bathsheba Garnett German Teacher
Luis Sequeira Assistant Costume Designer
Dwayne Hill Coach Carr
Daniel DeSanto Jason
Robin D. Cook Casting
Miranda Edwards Michigan Girl
David Reale Glenn Coco (uncredited)
Stefanie Drummond Bethany Byrd
Sharron Matthews Joan the Secretary
Randy K. Singer Foley Mixer
Cary White Production Design
Bruce Hunter Mathlete Moderator
Sarah Monat Foley Artist
Andrew Shea First Assistant Director
Chuck Michael Supervising Sound Editor
James Powers Production Manager
Alexandra Stapley Taylor Wedell
Susan Shopmaker Casting
Julia Chantrey Amber D'Alessio
Robin Harlan Foley Artist
Daryn Okada Director of Photography
Alison Reid Stunts
Krysta Carter Wannabe (uncredited)
Jamie Sparer Roberts Casting Associate
Rolfe Kent Original Music Composer
Kristen Bone Short Girl
Wendy Greene Bricmont Editor
Joel Hay Third Assistant Director
Bryan J. Thomas Stunts
Mike Szakmeister Supervising Dialogue Editor
Taryn Ash Stunts
John Stoneham Jr. Stunt Coordinator
Marci Liroff Casting
Bob Baron ADR Mixer
Alisha Morrison Lea Edwards
Gary Deneault Electrician
Frank Smathers Dialogue Editor
Jack Newman History Teacher
Angelique Lewis Stunts
Julie Feiner ADR Editor
Adam Bocknek Production Assistant
Les Porter Chemistry Teacher
Louise Rosner-Meyer Unit Production Manager, Co-Producer
Billy Oliver Stunts
Tyson Fennell Nfume
Jo Chim Salesperson
Dan Willmott Mr. George
Willard Overstreet Foley Editor
Anne Couk Assistant Sound Editor