Amanda Seyfried Karen Smith
Lacey Chabert Gretchen Wieners
Rachel McAdams Regina George
Lizzy Caplan Janis Ian
Tina Fey Screenplay, Ms. Norbury
Lindsay Lohan Cady Heron
Miranda Edwards Michigan Girl
Patricia Cuccia Set Decoration
Ana Gasteyer Cady's Mom
Neil Flynn Cady's Dad
Diego Klattenhoff Shane Oman
Angelo Colavecchia Steadicam Operator, Camera Operator
Taryn Ash Stunts
Jamie Sparer Roberts Casting Associate
Jonathan Malen Kristen's Boyfriend
Laura de Carteret Mrs. Wedell
Susan Shopmaker Casting
Cary White Production Design
Lorne Michaels Producer
Amy Poehler Mrs. George
Bathsheba Garnett German Teacher
Tim Meadows Mr. Duvall
Sarah Campbell Second Assistant Director
Sarah Monat Foley Artist
Jill Morrison Crying Girl
Bryan Hirota Visual Effects Supervisor
Randy K. Singer Foley Mixer
Buck Damon Music Supervisor
Jonathan Bennett Aaron Samuels
Chuck Michael Supervising Sound Editor
Eve Crawford English Teacher
Michael Carella "B" Camera Operator
Amanda Scheer-Demme Music Supervisor
Dane Clark Casting Assistant
David Reale Glenn Coco (uncredited)
James Powers Production Manager
Dan Willmott Mr. George
Alison Reid Stunts
Louise Rosner-Meyer Co-Producer, Unit Production Manager
Nick South Music Editor
Mike Szakmeister Supervising Dialogue Editor
Adam Bocknek Production Assistant
Frank Smathers Dialogue Editor
Kym Kristalie Stunts
Mark Waters Director
John Stoneham Jr. Stunt Coordinator
Julie Feiner ADR Editor
Marie-Claude Harnois Production Coordinator
Billy Oliver Stunts
Ely Henry Homeschooled Boy
Willard Overstreet Foley Editor
Karen Pidgurski Unit Publicist
Robin D. Cook Casting
Michael Gibson Still Photographer
Beth Sterner Supervising Sound Editor
Dana E. Glauberman Additional Editing
Andy Jekabsons First Assistant "B" Camera
Mike Stanwick Color Timer
Bruce Hunter Mathlete Moderator
Susan Kurtz Dialogue Editor
Daniel Franzese Damian
Carol Hartwick Hairstylist
Bruce Carwardine Sound Mixer
Luis Sequeira Assistant Costume Designer
Jim Harrison Music Editor
Bob Baron ADR Mixer
Mario Cacioppo Makeup Artist
Janet Cormack Scenic Artist
Patrick Cyccone Jr. Sound Re-Recording Mixer
Julia Chantrey Amber D'Alessio
Jill Messick Executive Producer
Marc Kuitenbrouwer Construction Coordinator