You'll Find Out (1940)

Director: David Butler

The manager of Kay Kyser’s band books them for a birthday party bash for an heiress at a spooky mansion, where sinister forces try to kill her.

Cast

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