Jason Lee Dave
Justin Long Alvin (voice)
Jane Lynch Gail
David Cross Ian
Matthew Gray Gubler Simon (voice)
Cameron Richardson Claire
Beth Riesgraf Mother in Store
Jesse McCartney Theodore (voice)
Christopher Flick Foley Editor
Adriane Lenox Vet
Jon Vitti Screenplay, Story
Will McRobb Screenplay
Alicia Stevenson Foley Artist
Erin Chambers Press Coordinator
Tim Hill Director
Debbie Evans Stunts
George Fisher Stunts
Dawn Fintor Foley Artist
Jillian Warry Barberie Jillian Reynolds
Christopher Lennertz Original Music Composer
Arnon Milchan Executive Producer
Janice Karman Producer, Theodore (singing voice) (uncredited)
Ross Bagdasarian Jr. Alvin (singing voice) (uncredited)
Oliver Muirhead Butler
Gary Burritt Negative Cutter
Mindy Marin Casting
Christian Wood Digital Compositor
Ross Bagdasarian Producer, Characters
Peter Lyons Collister Director of Photography
Chris Viscardi Screenplay
Christopher Scott Dancer
Scott Curtis Foley Editor
R.J. Kizer ADR Editor
Jayden Lund Security Guard
Paul Massey Sound Mixer
Armen Ksajikian Musician
Don Tiffany Engineer
Kevin Symons Ted
Natalie Cohen Poolside Girl (uncredited)
Frank Maharajh Barry
Jaimie Trueblood Still Photographer
Cheri Minns Makeup Department Head
Gloria D'Alessandro Dialogue Editor
David Betancourt Foley Mixer
Rosero McCoy Choreographer
Veronica Alicino Amy
John Robotham Stunts
David Giammarco Sound Mixer
Doug Jackson Sound Effects Editor
Justin Hammond Lighting Technician
Emily Ferry Property Master
David MacMillan Production Sound Mixer
Michele Panelli-Venetis Associate Producer
Julianne Jordan Music Supervisor
Anne D. McCulley Set Decoration
Tiara Parker Female Intern 2
Allison Karman Female Intern 1
Dan Haring Lighting Technician
Celestina Aladekoba Dancer
Nick Drago Dancer
Tom Brown Music Arranger
Karen Rosenfelt Executive Producer
Rebecca Robertson Script Supervisor
Mildred Iatrou Supervising Sound Editor
John Moio Stunt Coordinator
Susan Dawes Supervising Sound Editor
Toni-Ann Walker Hair Department Head
Alexandra Welker Costume Design
Harry Muller Color Timer
Leigh Shanta Unit Production Manager
Melanie Lewis Dancer
Peter E. Berger Editor