Himself
Kay Kyser
Professor Karl Fenninger
Peter Lorre
Ish Kabibble
M.A. Bogue
Sully Mason
Mary (uncredited)
Mary Bovard
Mr. Corey (uncredited)
Jeff Corey
Marion (uncredited)
Louise Currie
Lady In Taxi (uncredited)
Bess Flowers
Jean (uncredited)
Jeanne Houser
Script Man (uncredited)
Richard Kipling
Ms. Gaby Lawson (uncredited)
Eleanor Lawson
Apartment Complainer (uncredited)
Larry McGrath
Judge Spencer Mainwaring
Boris Karloff
Cabbie (uncredited)
Frank Mills
Mimi (uncredited)
Mimi Montaye
Penny (uncredited)
Dorothy Moore
Real Karl Fenninger (uncredited)
Leonard Mudie
Servant (uncredited)
Joseph North
Apartment Responder (uncredited)
Frank O'Connor
Mother (uncredited)
Beulah Parkington
Jane (uncredited)
Jane Patten
French Maid (uncredited)
Eugenia Rafee
Mac (uncredited)
William Telaak
Prince Saliano
Bela Lugosi
Joan (uncredited)
Joan Warner
Infant (uncredited)
Guy Webster
Georgia (uncredited)
Mary Martha Wood
Janis Bellacrest
Helen Parrish
Chuck Deems
Dennis O'Keefe
Aunt Margo Bellacrest
Alma Kruger
Jurgen
Joseph Eggenton
Herself
Ginny Simms
Harry Babbitt
Special Effects
Vernon L. Walker
Director
David Butler
Story
Producer
Screenplay
James V. Kern
Cinematography
Frank Redman
Editor
Irene Morra
Costume Design
Edward Stevenson
Assistant Director
Fred Fleck