cast
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Jason Lee
Shoeshine / Underdog (voice)
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Peter Dinklage
Dr. Simon Barsinister
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Jim Belushi
Dan Unger
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Patrick Warburton
Cad
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Alex Neuberger
Jack Unger
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Taylor Momsen
Molly
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John Slattery
Mayor
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Amy Adams
Polly Purebred (voice)
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Brad Garrett
Riff Raff (voice)
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Samantha Bee
Principal
- Timothy Crowe Police Chief
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Larry Vigus
Security Guard
- Mario Mariani Police Officer
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Bates Wilder
Cop
- Alexander 'Alex' Garde Small Boy
- Christopher Francis Byrnes Mailman (as Christopher Byrnes)
- Joe Siriani News Stand Guy (as Joseph Siriani)
-
Sujoy De
Office Worker #1
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Michele Proude
Office Worker #2
- Albert M. Chan Geek Worker
- Jon Pierce Hot Dog Vendor
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Susie Castillo
Diana Flores
- Bob Jaffe Professor
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Bruce-Robert Serafin
City Worker (as Bruce Serafin)
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Lonnie Farmer
Passerby
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Anthony Estrella
Male School Teacher (as Tony Estrella)
- Malik McMullen Bomb Squad Officer
- Aaron Dorsey Little Boy
- Walter Covell Old Man
- Kate Lohman Housewife
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Lewis D. Wheeler
Geek with Glasses
- Ellen Withrow Female Teacher
- John M. Deluca Newscaster
-
Frank Ridley
Police Sergeant
- Grady Justice College Guy
- Courtney O'Reagan College Girl
- Rebekah Aramini Fox Collar Lady
- Richney Fischer Baseball Dad
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Joe Stapleton
Cat Burglar Police #1
-
Armen Garo
Cat Burglar Police #2
- Daniel Kirby News Director
- Stephen James Kidd Bomb Squad Member (as Steve Kidd)
-
Rena Maliszewski
Mother
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Diana Shneider
Police Secretary
- Barry Blair SWAT Captain
- Bob Boehm Bomb Squad Officer #2 (as Robert Boehm)
- Lincoln P. Sisson Bomb Squad Officer #3
- Gabriel Field Lyle
- Harry L. Thomas Police Artist
- Amy Tanner Kissing Girl
- Nicole Kopka Jogger in Park
- Adam McCarthy Capitol City Security
- Roy Souza Capitol City Cop
- Tom Paolino Capitol City Cop
- Scott Dittman Hot Dog Contestant
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Ezra Buzzington
Referee
- Chris Andrew Ciulla Fireman (as Chris Ciulla)
-
Jay Leno
Jay Leno
-
Phil Morris
Supershep 1 (voice)
-
Michael Massee
Supershep 2 (voice)
-
Cam Clarke
Little Brown Dog / Supershep 3 (voice)
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John DiMaggio
Bulldog / Supershep 4 (voice)
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Danny Mastrogiorgio
Crazy Dog (voice)
-
Jess Harnell
Astronaut (voice)
-
Joe Bucaro III
Goon #1
-
Stuart F. Wilson
Goon #2
-
John Franchi
Observer (uncredited)
-
Susan Garfield
Office Worker (uncredited)
- Michael Tyler Henry Jack Unger (voice)