Patrice Munsel
— Nellie Melba
Robert Morley
— Oscar Hammerstein I
John McCallum
— Charles Armstrong
John Justin
— Eric Walton
Alec Clunes
— Cesar Carlton
Martita Hunt
— Mme. Marchesi
Sybil Thorndike
— Queen Victoria
Joseph Tomelty
— Thomas Mitchell
Beatrice Varley
— Aunt Catherine
Violetta Elvin
— Prima Ballerina
Cecile Chevreau
— Annette
Theodore Bikel
— Paul Brotha
Charles Craig
— Man (uncredited)
Marcel Poncin
— Roger (uncredited)
Robert Rietti
— Italian Policeman (uncredited)
Bill Shine
— Man (uncredited)
Dorit Welles
— Adelina Patti (uncredited)