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Jan Kiepura as Riccardo Gatti |
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Aileen Marson as Mary Newberg |
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Emlyn Williams as Theodore Bruckner |
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Sonnie Hale as Gatti's secretary |
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Reginald Smith as Baron Felix Kleeberg |
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Gina Malo as Kleeberg's Brunet |
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George Merritt as Otto Newberg |
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Muriel George as Mrs. Newberg |
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D.J. Williams as Opera House Secretary |
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Bruce Winston as |
| Production | Arnold Pressburger | Producer |
| Sound | Mischa Spoliansky | Music |
| Costume & Make-Up | Berleo | Costume Design |
| Art | Alfred Junge | Art Direction |
| Writing | Irma von Cube | Musical |
| Directing | Maurice Elvey | Director |
| Production | Michael Balcon | Producer |
| Writing | Ernst Marischka | Musical |
| Editing | Charles Frend | Editor |
| Writing | Robert Edmunds | Adaptation |
| Writing | Richard Benson | Adaptation |
| Writing | Austin Melford | Adaptation |
| Camera | Charles Van Enger | Director of Photography |
| Sound | Philip Dorté | Sound Recordist |
