Kay Kyser
Himself
Peter Lorre
Professor Karl Fenninger
Boris Karloff
Judge Spencer Mainwaring
Béla 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
M.A. Bogue
Ish Kabibble
Sully Mason
Mary Bovard
Mary (uncredited)
Jeff Corey
Mr. Corey (uncredited)
