Lacey Chabert Gretchen Wieners
Amanda Seyfried Karen Smith
Tina Fey Ms. Norbury, Screenplay
Rachel McAdams Regina George
Tim Meadows Mr. Duvall
Lorne Michaels Producer
Mark Waters Director
Lindsay Lohan Cady Heron
Alison Reid Stunts
Jill Morrison Crying Girl
Mary Nelson Negative Cutter
Lizzy Caplan Janis Ian
Diego Klattenhoff Shane Oman
Marci Liroff Casting
Rolfe Kent Original Music Composer
Neil Flynn Cady's Dad
Ana Gasteyer Cady's Mom
Bob Baron ADR Mixer
Jonathan Malen Kristen's Boyfriend
Nick South Music Editor
Michael Galbraith Chief Lighting Technician
Cary White Production Design
Anne Couk Assistant Sound Editor
Susan Shopmaker Casting
Taryn Ash Stunts
Robert Cochrane Dolly Grip
Amy Poehler Mrs. George
Carol Hartwick Hairstylist
Michael Gibson Still Photographer
Mary Jane Fort Costume Design
Sarah Campbell Second Assistant Director
Susan Kurtz Dialogue Editor
Miranda Edwards Michigan Girl
Patrick Cyccone Jr. Sound Re-Recording Mixer
Jonathan Bennett Aaron Samuels
Eve Crawford English Teacher
James Powers Production Manager
Karen Pidgurski Unit Publicist
Robert Doyle Assistant Editor
Laura de Carteret Mrs. Wedell
Dan Willmott Mr. George
Ely Henry Homeschooled Boy
Mark Cyre First Assistant Camera
Robin Harlan Foley Artist
Marc Fishman Sound Re-Recording Mixer
Mike Szakmeister Supervising Dialogue Editor
Andy Jekabsons First Assistant "B" Camera
Bruce Hunter Mathlete Moderator
Daniel Franzese Damian
Robin D. Cook Casting
Sarah Monat Foley Artist
Donna Dupere Extras Casting
Gerrod Shully Production Assistant
Julia Chantrey Amber D'Alessio
Dana E. Glauberman Additional Editing
Angelo Colavecchia Steadicam Operator, Camera Operator
Olympia Lukis Jessica Lopez
Wai Choy Mathlete Tim Pak
John Stoneham Jr. Stunt Coordinator
David Reale Glenn Coco (uncredited)
Stefanie Drummond Bethany Byrd
Daniel DeSanto Jason
Erin Norah Thompson Dawn Schweitzer
Bathsheba Garnett German Teacher
Brandt Gordon Art Direction
Wendy Greene Bricmont Editor
Mike Stanwick Color Timer
Michael Carella "B" Camera Operator
Kristen Bone Short Girl
Jeremy Pitts Foley Editor
Patricia Cuccia Set Decoration
Vic Rigler Property Master