Cast
Live-action actors
- Jason Lee as Dave Seville, a struggling songwriter and father figure to Alvin, Simon and Theodore
- David Cross as Ian Hawke, an executive at JETT Records
- Cameron Richardson as Claire Wilson, Dave's ex-girlfriend
- Jane Lynch as Gail, Dave's advertising boss
- Kevin Symons as Ted
- Frank Maharajh as Barry
- Veronica Alicino as Amy
- Beth Riesgraf as Mother in Store
- Adriane Lenox as Vet
- Erin Chambers as Press Coordinator
- Oliver Muirhead as Butler
- Don Tiffany as Engineer
- Lorne Green as Director
- Greg Siebel as Photographer
- Jayden Lund as Security Guard
- Chris Classic as DJ
Voice actors
- Justin Long as Alvin Seville
- Matthew Gray Gubler as Simon Seville
- Jesse McCartney as Theodore Seville
- Adam Riancho as French Doll
- Axel Alba as Spanish Doll
Trivia
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