Justin Long Alvin (voice)
Cameron Richardson Claire
Jason Lee Dave
Beth Riesgraf Mother in Store
Jane Lynch Gail
Jesse McCartney Theodore (voice)
David Cross Ian
Perry Dodgson Boom Operator
Matthew Gray Gubler Simon (voice)
Christopher Scott Dancer
Oliver Muirhead Butler
Ross Bagdasarian, Jr. Alvin (singing voice) (uncredited)
Janice Karman Producer, Theodore (singing voice) (uncredited)
Natalie Cohen Poolside Girl (uncredited)
Arnon Milchan Executive Producer
Adriane Lenox Vet
Mindy Marin Casting
George Fisher Stunts
Melanie Lewis Dancer
Joel Foster Animation
Alicia Stevenson Foley Artist
Gary Burritt Negative Cutter
John Robotham Stunts
Jayden Lund Security Guard
Tim Hill Director
Ross Bagdasarian Producer, Characters
Emily Ferry Property Master
Christopher Lennertz Original Music Composer
Dawn Fintor Foley Artist
Tiara Parker Female Intern 2
Erin Chambers Press Coordinator
Peter Lyons Collister Director of Photography
Chris Viscardi Screenplay
Frank Maharajh Barry
Julianne Jordan Music Supervisor
Evelyne Barbier Set Designer
Veronica Alicino Amy
Debbie Evans Stunts
Scott Curtis Foley Editor
Nick Drago Dancer
David Giammarco Sound Mixer
Allison Karman Female Intern 1
David MacMillan Production Sound Mixer
Paul Massey Sound Mixer
Karen Rosenfelt Executive Producer
Jon Vitti Screenplay, Story
Peter E. Berger Editor
Armen Ksajikian Musician
Kevin Symons Ted
Alexandra Welker Costume Design
David Betancourt Foley Mixer
Jillian Warry Barberie Jillian Reynolds
Anne D. McCulley Set Decoration
Rebecca Robertson Script Supervisor
R.J. Kizer ADR Editor
Kyndra Reevey Dancer
Charlie Daboub Art Direction
John Moio Stunt Coordinator
Don Tiffany Engineer
Will McRobb Screenplay
Rosero McCoy Choreographer
Richard Holland Production Design
Lissette Schettini Assistant Art Director
John Murray Foley Supervisor
Toni-Ann Walker Hair Department Head
Peggy Teague Makeup Artist
Christopher Flick Foley Editor
George Atamian Set Dresser
Michelle Maniscalco Dancer
Celestina Aladekoba Dancer
Tim Gomillion Sound Recordist
Michele Imperato Stabile Executive Producer, Unit Production Manager