Frank Welker

as Freddie Jones / Scooby-Doo (voice)

Mindy Cohn

as Velma Dinkley (voice)

Grey DeLisle

as Daphne Blake (voice)

Matthew Lillard

as Shaggy Rogers (voice)

Robin Atkin Downes

as Fortius / Announcer (voice)

Troy Baker

as Sergey Plotnikov (voice)

Josh Keaton

as Steve Looker (voice)

Janet Montgomery

as Diane (voice)

James Patrick Stuart

as Jack Riggins / Igor (voice)

Domitilla D'Amico

as Daphne Blake (uncredited)