Sean Astin Meerkat Manor Narrator (voice)
Anna Faris Jeanette (voice)
Wendie Malick Dr. Rubin
David Cross Ian
Zachary Levi Toby
Justin Long Alvin (voice)
Jason Lee Dave
Christina Applegate Brittany (voice)
Amy Poehler Eleanor (voice)
Rachele Brooke Smith Chipette Dancer
Alexandra Shipp Valentina
Jesse McCartney Theodore (voice)
Lanny Joon Paramedic
Matthew Gray Gubler Simon (voice)
David 'Goldy' Goldsmith Video Assist Operator
Gregg Binkley Emcee
Eric Bauza Digger the NASCAR Gopher (voice)
Aimee Carrero Emily
Mildred Iatrou Supervising Sound Editor
Brando Eaton Jeremy
Bernard White Doctor
Rosero McCoy Choreographer
Bridgit Mendler Becca
Arnon Milchan Executive Producer
Lori McCoy-Bell Hair Department Head
Doug Jackson Sound Effects Editor
Glenn Berger Writer
Joy Osmanski Airline Rep
Jonathan Aibel Writer
Steven Lambert Stunts
Ross Bagdasarian, Jr. Producer, Alvin (singing voice) (uncredited)
Betty Thomas Director
Nancy MacLeod Sound Effects Editor
Julie D'Antoni Visual Effects
Janice Karman Producer, Theodore / The Chipettes (singing voice) (uncredited)
Kathryn Joosten Aunt Jackie
Chris Warren Xander
Alicia Stevenson Foley Artist
Anjelah Johnson-Reyes Julie
John Murray Foley Supervisor
Chuck Michael Sound Effects Editor
Dawn Fintor Foley Artist
Juel Bestrop Casting
Willie D. Burton Sound Mixer
Ross Bagdasarian Characters
Laura Graham ADR Editor
R.J. Kizer ADR Editor
Jeff Carson Music Editor
Rebecca Robertson Script Supervisor
Steven R. Mathis Gaffer
Archie Hahn Agent
Jake Zyrus Charice Pempengco
Charles Crivier Key Grip
Cheri Minns Makeup Department Head
Julianne Jordan Music Supervisor
Paul Sonski Set Designer
Guy Bar'ely Animation
Scott Curtis Foley Editor
Karen Rosenfelt Executive Producer
Gee Alexander Simon Dance Double (uncredited)
Leigh Shanta Unit Production Manager
David Newman Original Music Composer
Paul Gonzales Charice Bassist (uncredited)
Casper Smart Dancer (uncredited)
Michael J. Benavente Supervising Sound Editor
Kevin G. Schmidt Ryan
Glenn Brown Steadicam Operator
Michael Keller Sound Re-Recording Mixer
Gary C. Bourgeois Sound Re-Recording Mixer
David Betancourt Foley Mixer
Tim Gomillion Sound Recordist
Merribelle Anderson Key Hair Stylist