Amanda Seyfried Needy
Megan Fox Jennifer
Chris Pratt Roman Duda
J.K. Simmons Mr. Wroblewski
Amy Sedaris Needy's Mom
Adam Brody Nikolai
Lance Henriksen Passing Motorist (uncredited)
Bill Fagerbakke Jonas' Dad
Kyle Gallner Colin Gray
Jason Reitman Producer
Eve Harlow Goth Girl
Johnny Simmons Chip
Adrian Hough Colin's Dad
Gabrielle Rose Colin's Mom
Roger Craig Smith ADR & Dubbing
Cynthia Stevenson Chip's Mom
Megan Charpentier Little Needy
Cathy Cavadini ADR & Dubbing
Karyn Kusama Director
Marilyn Norry Jonas' Mom
Emily Tennant Gossiping Girl
Genevieve Buechner Goth Girl #2
Laura Lee Connery Stunts
Diablo Cody Melody Lane Drinking Woman (uncredited), Writer, Executive Producer
Mike Crestejo Stunts
Mike Mitchell Stunts
Valerie Tian Chastity
Gary Hawes Third Assistant Director
Joel Swetow ADR & Dubbing
Owen Walstrom Stunts
Juno Rinaldi Officer Warzak
Ed Anders Stunt Coordinator, Orderly
Brad Kelly Stunts
Barbara Harris ADR & Dubbing
Juan Riedinger Dirk
Candus Churchill Nutritionist
Loyd Bateman Stunts
Jeremy Schuetze Craig
Vicki Davis ADR & Dubbing
Alan Freedman ADR Mixer
Andreana Weiner ADR & Dubbing
Lanei Chapman ADR & Dubbing
Hayley Williams Songs
Garvin Cross Stunts
Brad Loree Stunts
Mindy Marin Casting
Karissa Tynes Other Girl
Darryl Scheelar Stunts
Carrie Genzel Jennifer's Mom
Caroline Field Stunts
Christopher Elke Visual Effects Producer
Randall Poster Music Supervisor
Andrea Baker ADR & Dubbing
Dan Redford Stunts
Erik Nordby Visual Effects Supervisor
Krista Bell Stunts
Jeff Fischer ADR & Dubbing
Sam Harris Second Unit First Assistant Director
Anthony David Moyer Stunts
Dan Joffre Raymundo
Theodore Shapiro Original Music Composer
Brendon Urie Songs
Brad Van Arragon Producer
Michael Bean Priest
Hector C. Gika Sound Editor
Mike Carpenter Stunts
Roxanne Wong Patient #1
Josh Emerson Jonas Kozelle
Ryan Ennis Stunts
Chris Dowell Post Production Supervisor
Jeremy Maxwell ADR & Dubbing
David Michie ADR & Dubbing