Hayden Panettiere Kate (voice) Justin Long Humphrey (voice) Dennis Hopper Tony (voice) Christina Ricci Lilly (voice) Danny Glover Winston (voice) Christine Lakin Reba (voice) Vicki Lewis Eve (voice) Elizabeth Tulloch Sweets (voice) Eric Price Paddy / Mooch (voice) Kevin Sussman Shakey (voice) Chris Carmack Garth (voice) Brian Donovan Salty (voice) Mindy Sterling Debbie (voice) Fred Tatasciore Garn (voice) Nika Futterman Porcupine (voice) Mela Lee Candy (voice) Larry Miller Marcel (voice) Steve Vinovich Park Ranger (voice) Aziz Ansari Thug (voice) (uncredited)