Kay Kyser

~ as ~

Himself

Peter Lorre

~ as ~

Professor Karl Fenninger

Boris Karloff

~ as ~

Judge Spencer Mainwaring

Bela Lugosi

~ as ~

Prince Saliano

Helen Parrish

~ as ~

Janis Bellacrest

Dennis O'Keefe

~ as ~

Chuck Deems

Alma Kruger

~ as ~

Aunt Margo Bellacrest

Joseph Eggenton

~ as ~

Jurgen

Ginny Simms

~ as ~

Herself

Harry Babbitt

~ as ~

Himself