You'll Find Out

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

M.A. Bogue

As Ish Kabibble

Sully Mason

As Himself

Mary Bovard

As Mary (uncredited)

Jeff Corey

As Mr. Corey (uncredited)

Louise Currie

As Marion (uncredited)

Bess Flowers

As Lady In Taxi (uncredited)

Jeanne Houser

As Jean (uncredited)

Richard Kipling

As Script Man (uncredited)

Eleanor Lawson

As Ms. Gaby Lawson (uncredited)

Larry McGrath

As Apartment Complainer (uncredited)

Frank Mills

As Cabbie (uncredited)

Mimi Montaye

As Mimi (uncredited)

Dorothy Moore

As Penny (uncredited)

Leonard Mudie

As Real Karl Fenninger (uncredited)

Joseph North

As Servant (uncredited)

Frank O'Connor

As Apartment Responder (uncredited)

Beulah Parkington

As Mother (uncredited)

Jane Patten

As Jane (uncredited)

Eugenia Rafee

As French Maid (uncredited)

William Telaak

As Mac (uncredited)

Joan Warner

As Joan (uncredited)

Guy Webster

As Infant (uncredited)

Mary Martha Wood

As Georgia (uncredited)