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.
Jason Lee
Dave
Justin Long
Alvin (voice)
Matthew Gray Gubler
Simon (voice)
Jesse McCartney
Theodore (voice)
Kimberly Williams-Paisley
Samantha
Josh Green
Miles
Tony Hale
Agent Suggs
Bella Thorne
Ashley Grey
