Zachary Levi Toby
Anna Faris Jeanette (voice)
Wendie Malick Dr. Rubin
Sean Astin Meerkat Manor Narrator (voice)
Jason Lee Dave
Christina Applegate Brittany (voice)
Justin Long Alvin (voice)
Lanny Joon Paramedic
David Cross Ian
Aimee Carrero Emily
Alexandra Shipp Valentina
Matthew Gray Gubler Simon (voice)
Eric Bauza Digger the NASCAR Gopher (voice)
Amy Poehler Eleanor (voice)
Kathryn Joosten Aunt Jackie
Jesse McCartney Theodore (voice)
Rachele Brooke Smith Chipette Dancer
Brando Eaton Jeremy
Jon Vitti Writer
Bernard White Doctor
Jonathan Aibel Writer
David Lucarelli Sound Recordist
Anjelah Johnson-Reyes Julie
Alicia Stevenson Foley Artist
Glenn Berger Writer
Kevin G. Schmidt Ryan
Gregg Binkley Emcee
Betty Thomas Director
David Newman Original Music Composer
Anthony B. Richmond Director of Photography
Dawn Fintor Foley Artist
Archie Hahn Agent
Arnon Milchan Executive Producer
Janice Karman Producer, Theodore / The Chipettes (singing voice) (uncredited)
Ross Bagdasarian Jr. Producer, Alvin (singing voice) (uncredited)
Marty Dew Chipmunk Dancer
Willie D. Burton Sound Mixer
Ross Bagdasarian Characters
Steven Lambert Stunts
Gary C. Bourgeois Sound Re-Recording Mixer
Cheri Minns Makeup Department Head
Doug Jackson Sound Effects Editor
Scott Curtis Foley Editor
R.J. Kizer ADR Editor
Chuck Michael Sound Effects Editor
Julie D'Antoni Visual Effects
Guy Bar'ely Animation
Bridgit Mendler Becca
Jaimie Trueblood Still Photographer
David Betancourt Foley Mixer
Elena Arroy Key Makeup Artist
Rosero McCoy Choreographer
Laura Graham ADR Editor
Gee Alexander Simon Dance Double (uncredited)
Galen Goodpaster First Assistant Sound Editor
David 'Goldy' Goldsmith Video Assist Operator
Charles Crivier Key Grip
Lori McCoy-Bell Hair Department Head
Joy Osmanski Airline Rep
Glenn Brown Steadicam Operator
Michael J. Benavente Supervising Sound Editor
Chris Warren Xander
Julianne Jordan Music Supervisor
Nancy MacLeod Sound Effects Editor
Rebecca Robertson Script Supervisor
Juel Bestrop Casting
David Lautman High School Student (uncredited)
Marcia Hinds Production Design
Tim Gomillion Sound Recordist
Mark Alkofer Football Referee (uncredited)
Jeff Carson Music Editor
Mildred Iatrou Supervising Sound Editor