Leo G. Carroll
Professor Wieck
Paul Henreid
Robert Schumann
Konstantin Shayne
Reinecke
Katharine Hepburn
Clara Wieck Schumann
Henry Daniell
Franz Liszt
Robert Walker
Johannes Brahms
Tala Birell
Princess Valerie Hohenfels
George Chakiris
Choir Boy
Pierre Watkin
Duke of X (uncredited)
Ludwig Stössel
Haslinger
Ann Carter
Marie Schumann
Henry Stephenson
King Albert
Jimmy Hunt
Ludwig Schumann
Roman Bohnen
Dr. Hoffman
Byron Foulger
Bailiff (uncredited)
Elsa Janssen
Bertha
Gigi Perreau
Julie
Kurt Katch
Judge
Janine Perreau
Eugenie Schumann
Eilene Janssen
Elise Schumann