Kay Kyser

Himself

Peter Lorre

Professor Karl Fenninger

Boris Karloff

Judge Spencer Mainwaring

Lugosi Béla

Prince Saliano

Helen Parrish

Janis Bellacrest

Dennis O'Keefe

Chuck Deems

Alma Kruger

Aunt Margo Bellacrest

Joseph Eggenton

Jurgen

Ginny Simms

Herself