| Cast list | | Mario Lanza | as | Tonio Costa | | Johanna von Koczian | as | Christa | | Kurt Kasznar | as | Ladislas Tabory | | Hans Söhnker | as | Prof. Bruckner (as Hans Sonker) | | Annie Rosar | as | Mathilde Faktotum | | Sandro Giglio | as | Alessandro | | Walter Rilla | as | Dr. Bessart | | Renzo Cesana | as | Angelo | | Peter Capell | as | Leopold Hübner | | Gisella Mathews | as | | | Michael Cosmo | as | Aldo | | Carlo Rizzo | as | | | John Stein | as | | | Manfred Schaffer | as | | | Zsa Zsa Gabor | as | Gloria De Vadnuz |
| | Crew list: | | Rudolph Maté (Director) | | Andrew Solt (Writer) |
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