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.
Dave
Alvin (voice)
Simon (voice)
Theodore (voice)
Samantha
Miles
Agent Suggs
Ashley Grey
Barry
Brittany (voice)
Eleanor (voice)
Jeanette (voice)
Party Cop #1
Party Cop #2
Wyatt the Pizza Guy
Kid
Paparazzi #1
Paparazzi #2
Ms. Price
TSA Officer
First Class Flight Attendant
Cab Coordinator
Party Planner
Owner
Clapping Person
Cab Driver
Giant Bearded Guy
Large Cowboy
Bus Driver
Ticket Agent
Man Behind Mask
Airline Ticket Agent
Young Employee
Hotel Babysitter
Maitre'd
Alice
American Idol Bad Auditioner
Passing Record Executive
DJ
Fan #1
Fan #2
First Record Executive
Second Record Executive
Judge
Anna
DJ at Party
Access Hollywood Reporter
Access Hollywood Anchor
Parade Woman
First Class Passenger
Party Guy
Miniature Golf Boy
Pool Attendant
Waitress Passing Lady
Female Bartender
Brass Band Member
Brass Band Member
Brass Band Member
Brass Band Member
Brass Band Member
Brass Band Member
Brass Band Member
Brass Band Member
"Alvin" Reader
"Simon" Reader
"Theodore" Reader
Shelbourne Hotel Guest (voice) (uncredited)
Alvin (singing voice) (uncredited)
Photographer (uncredited)
Theodore / The Chipettes (singing voice) (uncredited)
Producer
Choreographer
Producer
Characters
Characters
Choreographer
Storyboard
Stunt Driver
Choreographer
Supervising Art Director
Post Production Coordinator
Music Editor
Animation Supervisor
Senior Visual Effects Supervisor
Music Supervisor
Visual Effects Supervisor
Executive Producer
Executive Producer
Writer
Music Editor
Associate Producer
Choreographer
Set Decoration
Music Editor
Hair Department Head
Special Effects Coordinator
Second Unit Director
Associate Producer
Music Editor
Music Supervisor
Makeup Artist
Hairstylist
Production Design
Assistant Art Director
Visual Effects Producer
Choreographer
Supervising Sound Editor
Executive Producer
Hairstylist
Executive Producer
Sound Mixer
Visual Effects Editor
Visual Effects Editor
Supervising Sound Editor
Makeup Department Head
Visual Effects Supervisor
Costume Design
Original Music Composer
Executive Music Producer
Stunts
Stunt Coordinator
Visual Effects Producer
Stunts
Director of Photography
Director
Casting
Editor
Casting
Writer
CG Supervisor
CG Supervisor
Set Decorating Coordinator