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)
Edie Lehmann Boddicker
Singer (voice)
Paul DeKorte
Singer (voice)
Michael Redman
Singer (voice)
Debbie Hall
Singer (voice)
Robert Tebow
Singer (voice)