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