Casey Kasem as Shaggy Rogers (voice)

Don Messick as Scooby-Doo (voice)

Frank Welker as Fred Jones (voice)

Heather North as Daphne Blake (voice)

Patricia Stevens as Velma Dinkley (voice)

Ginny McSwain as Kerry / Girl Fan / Executive Secretary (voice)

Marilyn Schreffler as Cherie / Sis / Receptionist (voice)

Joan Gerber as Lavonne / Second Woman / Waitress (voice)

Rip Taylor as C.J. (voice)

Michael Bell as Jesse Rotten / V.P. Jackie Carlson (voice)

Stan Jones as Director / First V.P. / Terrier (voice)

Pat Fraley as Brother / Guard / Announcer (voice)

Edie Lehmann Boddicker as Singer (voice)

Paul DeKorte as Singer (voice)

Michael Redman as Singer (voice)

Debbie Hall as Singer (voice)

Robert Tebow as Singer (voice)