You'll Find Out

Jeff Corey as Mr. Corey (uncredited) Dorothy Moore as Penny (uncredited) Kay Kyser as Himself Dennis O'Keefe as Chuck Deems Frank Mills as Cabbie (uncredited) Leonard Mudie as Real Karl Fenninger (uncredited) Frank O'Connor as Apartment Responder (uncredited) Alma Kruger as Aunt Margo Bellacrest Mary Bovard as Mary (uncredited) Peter Lorre as Professor Karl Fenninger Lugosi Béla as Prince Saliano Harry Babbitt as Himself Louise Currie as Marion (uncredited) Bess Flowers as Lady In Taxi (uncredited) Eleanor Lawson as Ms. Gaby Lawson (uncredited) M.A. Bogue as Ish Kabibble Sully Mason as Himself Boris Karloff as Judge Spencer Mainwaring Helen Parrish as Janis Bellacrest Ginny Simms as Herself

Vernon L. Walker Special Effects David Butler Story, Director, Producer