Casey Kasem

Shaggy Rogers (voice)

Don Messick

Scooby-Doo (voice)

Frank Welker

Fred Jones (voice)

Heather North

Daphne Blake (voice)

Patricia Stevens

Velma Dinkley (voice)

Ginny McSwain

Kerry / Girl Fan / Executive Secretary (voice)

Marilyn Schreffler

Cherie / Sis / Receptionist (voice)

Joan Gerber

Lavonne / Second Woman / Waitress (voice)

Rip Taylor

C.J. (voice)

Michael Bell

Jesse Rotten / V.P. Jackie Carlson (voice)

Stan Jones

Director / First V.P. / Terrier (voice)

Pat Fraley

Brother / Guard / Announcer (voice)