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Mario Lanza as Tonio Costa |
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Johanna von Koczian as Christa |
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Zsa Zsa Gabor as Gloria de Vadnuz |
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Kurt Kasznar as Ladislas Tabory |
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Hans Söhnker as Prof. Bruckner |
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Annie Rosar as Mathilde |
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Peter Capell as Intendant Huebner |
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Walter Rilla as Dr. Bessart |
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Nico as blonde girl |
| Directing | Rudolph Maté | Director |
| Writing | Andrew Solt | Screenplay |
| Sound | George Stoll | Original Music Composer |
| Camera | Aldo Tonti | Director of Photography |
