Justin Long

Humphrey (voice)

Hayden Panettiere

Kate (voice)

Dennis Hopper

Tony (voice)

Danny Glover

Winston (voice)

Larry Miller

Marcel (voice)

Vicki Lewis

Eve (voice)

Chris Carmack

Garth (voice)

Kevin Sussman

Shakey (voice)

Christina Ricci

Lilly (voice)

Elizabeth Tulloch

Sweets (voice)

Christine Lakin

Reba (voice)

Mindy Sterling

Debbie (voice)

Fred Tatasciore

Garn (voice)

Nika Futterman

Porcupine (voice)

Steve Vinovich

Park Ranger (voice)

Aziz Ansari

Thug (voice) (uncredited)