Frank Welker

as Scooby-Doo / Fred Jones (voice)

Grey DeLisle

as Daphne Blake (voice)

Matthew Lillard

as Shaggy Rogers (voice)

Kate Micucci

as Velma Dinkley (voice)

Dee Bradley Baker

as Sea Creature / Malt Shop Walt / Zombie (voice)

JB Blanc

as Atticus Fink / Director (voice)

Christian Lanz

as Bryan Lakeshore / Mummy (voice)

Scott Menville

as Junior (voice)

Cassandra Peterson

as Drella Diabolique (voice)

James Arnold Taylor

as Chet Brickton / Narrator (voice)