Grey DeLisle Daphne Blake (voice)

Stephen Stanton Peanut Vendor (voice)

Kari Wahlgren Female Peasent (voice)

Frank Welker Scooby-Doo / Fred Jones / Monster (voice)

Kate Micucci Velma Dinkley / Sandi (voice)

Matthew Lillard Shaggy Rogers (voice)

Nick Frost Merlin (voice)

Greg Ellis Herald / Herman Ellinger / British Passenger (voice)

Jason Isaacs King Arthur Pendragon (voice)

Spike Brandt Mr. HB (voice)

Trevor Devall Man Cat (voice)

Fred Tatasciore Black Knight (voice)

Ted Barton Mayor Saunders / Sir Lancelot (voice)