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