Kay Kyser

Himself

Peter Lorre

Professor Karl Fenninger

Boris Karloff

Judge Spencer Mainwaring

Bela Lugosi

Prince Saliano

Helen Parrish

Janis Bellacrest

Dennis O'Keefe

Chuck Deems

Alma Kruger

Aunt Margo Bellacrest

Joseph Eggenton

Jurgen

Ginny Simms

Herself

Harry Babbitt

Himself

M.A. Bogue

Ish Kabibble

Sully Mason

Himself

Mary Bovard

Mary (uncredited)

Jeff Corey

Mr. Corey (uncredited)

Louise Currie

Marion (uncredited)

Bess Flowers

Lady In Taxi (uncredited)

Jeanne Houser

Jean (uncredited)

Richard Kipling

Script Man (uncredited)

Eleanor Lawson

Ms. Gaby Lawson (uncredited)

Larry McGrath

Apartment Complainer (uncredited)