Dan Castellaneta

Earthworm Jim / Grim Reaper / Turns-His-Eyes-Inside-Out Boy / Evil Jim / Abraham Lincoln / Japius / Stock Broker

Jeff Bennett

Peter Puppy / Narrator / Hamsternator / Neighbor / Thug #1 / Billy's Dad / President / Therapist / Great Worm Spirit

Jim Cummings

Psy-Crow / Whooping Cough Boy / Zantor / Bird / Johnny Dactyl / Bob the Killer Goldfish / Number One / Number Two / Sword of Righteousness / Walter / Cuban Band Leader / Santa Claus

Kath Soucie

Princess What's-Her-Name / Cody / Malice The Dog / Billy / Johnny Dactyl's Mom / Little Girl / Perpsichore

Charlie Adler

Professor Monkey-For-A-Head / Rudolph the Red-Nosed Reindeer / Little Boy / Doorman of the Gods / Taxidermist

Edward Hibbert

Evil the Cat

Andrea Martin

Queen Slug-For-A-Butt / Mrs. Bleverage

John Kassir

Snott / Henchrat