Bruce Willis
RJ (voice)
Garry Shandling
Verne (voice)
Steve Carell
Hammy (voice)
Wanda Sykes
Stella (voice)
William Shatner
Ozzie (voice)
Nick Nolte
Vincent (voice)
Thomas Haden Church
Dwayne (voice)
Allison Janney
Gladys (voice)
Eugene Levy
Lou (voice)
Catherine O'Hara
Penny (voice)
Avril Lavigne
Heather (voice)
Omid Djalili
Tiger (voice)
Shane Baumel
Spike (voice)
Madison Davenport
Quillo (voice)
Ariel Winter
(voice)
Michaela Jill Murphy
(voice)
Paul Butcher
Skeeter (voice)
Jessica DiCicco
Shelby (voice)
Debra Wilson
Debbie (voice)
Jeannie Elias
Janis (voice)
Geoffrey Pomeroy
Ranger (voice)
Joel McCrary
Dr. Dennis (voice)
Brian Stepanek
Nugent the Dog (voice)
Kirk Baily
(voice)
Michelle Ruff
(voice)
Nicholas Guest
(voice)
Bridget Hoffman
(voice)
Marcelo Tubert
(voice)
Sami Kirkpatrick
Bucky (voice)
Zoe Randol
Mackenzie (voice)
Sean Bishop
Police Officer (voice)
Kejon Kesse
Timmy (voice)
Sean Yazbeck
BBQ Barry (voice)
Lee Bienstock
Lunch Table Larry (voice)
Steve Alterman
(voice)
Erin Lander
(voice)
Jordan Orr
(voice)
Greyson Spann
(voice)
David Hiller
(voice)
April Lawrence
Navistar GPS System (voice)
Sandy Holt
(voice)
Talula Holt
(voice)
Pat Fry
TV Announcer (voice) (uncredited)
