Karl Hartl Director, Producer Hans Holt Wolfgang Amadeus Mozart Actor Winnie Markus Constanze Mozart Actor Walter Janssen Leopold Mozart Actor Rosa Albach-Retty Anna Maria Mozart Actor Irene von Meyendorff Aloisia Lange Actor Annie Rosar Frau Weber Actor Thea Weis Sophie Weber Actor Susi Witt Josepha Weber Actor Erich Nikowitz Franz Xaver Süßmayr Actor Paul Hoerbiger Von Strack Actor Curd Jürgens Kaiser Joseph II. Actor Hans Siebert Herzog von Mannheim Actor Richard Eybner Baron von Gemmingen Actor René Deltgen Ludwig van Beethoven Actor Fritz Imhoff Johann Georg Albrechtsberger Actor Karl Blühm Hoeffer Actor Eduard von Borsody Screenwriter Richard Billinger Writer E. Strzygowski Writer Günther Anders Cinematographer