Frank Welker
Freddie Jones / Scooby-Doo (voice)

Mindy Cohn
Velma Dinkley (voice)

Grey DeLisle
Daphne Blake (voice)

Matthew Lillard
Shaggy Rogers (voice)

Robin Atkin Downes
Fortius / Announcer (voice)

Troy Baker
Sergey Plotnikov (voice)

Josh Keaton
Steve Looker (voice)

Janet Montgomery
Diane (voice)

James Patrick Stuart
Jack Riggins / Igor (voice)

Domitilla D'Amico
Daphne Blake (uncredited)