Ashley Johnson
Peter Shepherd (voice)
William Sanderson
Professor J.S. Ibsen (voice)
Pamela Adlon
Rock (voice)
Debi Derryberry
Judy Shepherd (voice)
Sherman Howard
Van Pelt (voice)
Melanie Chartoff
Aunt Nora Shepherd (voice)
Bill Fagerbakke
Alan Parrish (voice)
Billy West
(voice)
Tim Curry
Trader Slick (voice)
Danny Mann
Umpire (voice)
Kevin Schon
Dead-Eye (voice)