Justin Long Alvin (voice)
Jason Lee Dave
Cameron Richardson Claire
David Cross Ian
Jane Lynch Gail
Matthew Gray Gubler Simon (voice)
Beth Riesgraf Mother in Store
Jesse McCartney Theodore (voice)
Emily Ferry Property Master
Adriane Lenox Vet
Arnon Milchan Executive Producer
George Fisher Stunts
Alicia Stevenson Foley Artist
Gary Burritt Negative Cutter
Jon Vitti Screenplay, Story
Jillian Warry Barberie Jillian Reynolds
Ross Bagdasarian, Jr. Alvin (singing voice) (uncredited)
Oliver Muirhead Butler
Peter Lyons Collister Director of Photography
Mindy Marin Casting
Janice Karman Producer, Theodore (singing voice) (uncredited)
Tim Hill Director
Paul Massey Sound Mixer
R.J. Kizer ADR Editor
David Giammarco Sound Mixer
Debbie Evans Stunts
Veronica Alicino Amy
Christopher Lennertz Original Music Composer
David Betancourt Foley Mixer
Christopher Flick Foley Editor
Dawn Fintor Foley Artist
Armen Ksajikian Musician
Justin Hammond Lighting Technician
Melanie Lewis Dancer
Tiara Parker Female Intern 2
Julianne Jordan Music Supervisor
Doug Jackson Sound Effects Editor
Mildred Iatrou Supervising Sound Editor
John Robotham Stunts
Ross Bagdasarian Producer, Characters
Scott Curtis Foley Editor
Tim Gomillion Sound Recordist
Harry Muller Color Timer
Natalie Cohen Poolside Girl (uncredited)
Nick Drago Dancer
Jayden Lund Security Guard
Cheri Minns Makeup Department Head
John Murray Foley Supervisor
Emily A. Wilson Art Department Coordinator
Christian Wood Digital Compositor
Gloria D'Alessandro Dialogue Editor
Michele Panelli-Venetis Associate Producer
Karen Rosenfelt Executive Producer
Toni-Ann Walker Hair Department Head
Kevin Symons Ted
Erin Chambers Press Coordinator
John Moio Stunt Coordinator
Chris Viscardi Screenplay
Celestina Aladekoba Dancer
Frank Maharajh Barry
David MacMillan Production Sound Mixer
Susan Dawes Supervising Sound Editor
Christopher Scott Dancer
Kyndra Reevey Dancer
Michele Imperato Stabile Executive Producer, Unit Production Manager
Joel Foster Animation
Galen Goodpaster First Assistant Sound Editor
Anne D. McCulley Set Decoration
Michael Axinn ADR Editor
Charlie Daboub Art Direction
Rebecca Robertson Script Supervisor
Dan Haring Lighting Technician