Frank Welker

as Scooby-Doo / Fred Jones (voice)

Casey Kasem

as Shaggy Rogers (voice)

Grey DeLisle

as Daphne Blake / Cat Witch / Honeybee (voice)

Mindy Cohn

as Velma Dinkley (voice)

Lauren Bacall

as The Grand Witch (voice)

Tim Curry

as The Goblin King (voice)

Jim Belushi

as Glob (voice)

Wayne Knight

as The Amazing Krudsky (voice)

Wallace Shawn

as Mr. Gibbles (voice)

Hayden Panettiere

as Fairy Princess Willow (voice)

Larry Joe Campbell

as Glum (voice)

Jay Leno

as Jack O'Lantern (voice)

Thom Adcox-Hernandez

as Sparkplug (voice)

Russi Taylor

as Owl Witch / Tiddlywink (voice)