Jason Lee
/Dave
Jesse McCartney
/Theodore
Justin Long
/Alvin
Matthew Gray Gubler
/Simon
Kimberly Williams-Paisley
/Samantha
Tom Hale
/Actor
Walt Becker
/Director
Ross Bagdasarian Jr.
/Producer
Janice Karman
/Producer
Randi Mayem Singer
/Writer
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December 18, 2015
Animation
Through a series of misunderstandings, Alvin, Simon and Theodore come to believe that Dave is going to propose to his new girlfriend in New York City... and dump them. They have three days to get to him and stop the proposal, saving themselves not only from losing Dave but possibly from gaining a terrible stepbrother.
