- Rex Harrison
- Sir Alfred De Carter
- Linda Darnell
- Daphne De Carter
- Rudy Vallee
- August Henshler
- Barbara Lawrence
- Barbara Henshler
- Kurt Kreuger
- Tony Windborn
- Lionel Stander
- Hugo Standoff
- Edgar Kennedy
- Detective Sweeney
- Al Bridge
- House Detective
- Julius Tannen
- O'Brien
- Torben Meyer
- Dr. Schultz
- Abdullah Abbas
- Concert Attendee
- Pati Behrs
- Minor Role
- George Beranger
- Maître d'hôtel
- Evelyn Beresford
- Madame Pompadour
- Georgia Caine
- Dowager in Concert Box
- James Carlisle
- Concert Attendee
- Harry Carter
- Reporter
- Bill Cartledge
- Page Boy
- Ruth Clifford
- Saleslady
- Heinie Conklin
- Concert Attendee
- Sayre Dearing
- Concert Attendee
- Jack Deery
- Restaurant Patron
- Charles Fogel
- Concert Attendee
- Kay Garrett
- Concert Attendee
- Douglas Gerrard
- Minor Role
- James Gonzalez
- Restaurant Patron
- Herschel Graham
- Concert Attendee
- Robert Greig
- Jules - the Valet
- Stuart Hall
- Concert Attendee
- Sam Harris
- Restaurant Diner / Concert Attendee (uncredited)
- Isabel Jewell
- First Telephone Operator
- Colin Kenny
- Concert Attendee
- Laurette Luez
- Lannie - Hatcheck Girl
- J. Farrell MacDonald
- Stage Doorman
- Marion Marshall
- Maisie - Second Telephone Operator
- George Matthews
- Musician
- Harry Mayo
- Concert Attendee
- George Melford
- Concert Attendee
- Harold Miller
- Onlooker at Murder Scene
- Frank Mills
- Stage Hand
- Hans Moebus
- Concert Attendee
- Frank Moran
- Fire Chief
- Dave Morris
- Musician
- George Nardelli
- Maitre D'
- Monty O'Grady
- Concert Attendee
- Manuel ParÃs
- Concert Attendee
- Foster H. Phinney
- Concert Attendee
- Paul Power
- Concert Attendee
- Suzanne Ridgway
- Concert Attendee
- Franz Roehn
- Musician
- Cosmo Sardo
- Concert Attendee
- Tamara Schee
- Madame La Lotte
- Harry Seymour
- Musician
- Charles Tannen
- Airport Information Man
- Max Wagner
- Stage Manager
- Chalky Williams
- Bailiff
