Jason Lee
Dave
Acting
David Cross
Ian
Acting
Cameron Richardson
Claire
Acting
Jane Lynch
Gail
Acting
Justin Long
Alvin (voice)
Acting
Matthew Gray Gubler
Simon (voice)
Acting
Jesse McCartney
Theodore (voice)
Acting
Allison Karman
Female Intern 1
Acting
Tiara Parker
Female Intern 2
Acting
Kira Verrastro
Female Intern 3
Acting
Veronica Alicino
Amy
Acting
Beth Riesgraf
Mother in Store
Acting
Adriane Lenox
Vet
Acting
Don Tiffany
Engineer
Acting
Lorne Green
Director
Acting
Kevin Symons
Ted
Acting
Frank Maharajh
Barry
Acting
Greg 'G-Spot' Siebel
Photographer
Acting
Oliver Muirhead
Butler
Acting
Jayden Lund
Security Guard
Acting
Erin Chambers
Press Coordinator
Acting
Jillian Warry Barberie
Jillian Reynolds
Acting
Chris Classic
DJ
Acting
Adam Riancho
French Doll (voice)
Acting
Axel Alba
Spanish Doll (voice)
Acting
Rosero McCoy
Choreographer
Crew
Alexis Boyd
Dancer
Acting
Criscilla Anderson
Dancer
Acting
Kevin Fisher
Dancer
Acting
Kyndra Reevey
Dancer
Acting
Tucker Barkley
Dancer
Acting
Celestina Aladekoba
Dancer
Acting
Laura Edwards
Dancer
Acting
Christopher Scott
Dancer
Crew
Miss Prissy
Dancer
Acting
Bryan Gaw
Dancer
Acting
Michelle Maniscalco
Dancer
Acting
Nick Drago
Dancer
Acting
Melanie Lewis
Dancer
Acting
Natalie Cohen
Poolside Girl (uncredited)
Acting
Ross Bagdasarian, Jr.
Alvin (singing voice) (uncredited)
Acting
Janice Karman
Theodore (singing voice) (uncredited)
Acting
Lisa Mason Lee
Band Member (uncredited)
Acting
Meghan Noone
Alvin's Fan (uncredited)
Crew
Chris Rossi
Dancer (uncredited)
Writing
Jameel Saleem
Band Roadie (uncredited)
Writing
Melanie Stephens
Dancing DJ (uncredited)
Acting