You'll Find Out (1940)

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

J

Joseph Eggenton

as Jurgen

Ginny Simms

as Herself

Harry Babbitt

as Himself

M.A. Bogue

as Ish Kabibble

Mary Bovard

as Mary (uncredited)

Jeff Corey

as Mr. Corey (uncredited)

Louise Currie

as Marion (uncredited)

Bess Flowers

as Lady In Taxi (uncredited)

R

Richard Kipling

as Script Man (uncredited)

Eleanor Lawson

as Ms. Gaby Lawson (uncredited)

L

Larry McGrath

as Apartment Complainer (uncredited)