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)

David Herman

as Jack / Sheriff (voice)

Janell Cox

as Cat Person / Sister Withers (voice)

Cassandra Peterson

as Elvira (voice)

Roger Rose

as Lead Cat Person / Narrator (voice)

John Michael Higgins

as Alan Smithee (voice)

Travis Willingham

as Seaver (voice)

Dave B. Mitchell

as Driver / Ferry Captain (voice)