Stephen Haggard

Wolfgang Amadeus Mozart

Victoria Hopper

Constance Mozart

John Loder

Prince Lobkowitz

Jean Cadell

Frau Mozart

Hubert Harben

Leopold Mozart

Frederick Leister

Emperor

Marie Lohr

Empress

Laurence Hanray

Archbishop of Salzburg

Deidre Gale

Antoinette as a Child

Pat Fitzpatrick

Mozart as a Boy

Norman Walker

Emanuel Schikaneder

George Curzon

Lorenzo Da Ponte

Richard Goolden

Weber

Muriel George

Frau Weber

Raymond Huntley

Langer

Leueen MacGrath

Josefa Weber

Oda Slobodskaya

Singer

Percy Heming

Singer

Tudor Davies

Singer

Enid James

Singer

Sylvia Nelis

Singer

Rowena Sanders

Thomas Beecham

Himself - Conductor, London Symphony Orchestra

Clarence Bigge

(uncredited)

Arthur Burne

(uncredited)

Frank Crawshaw

(uncredited)

Aubrey Dexter

(uncredited)

Janet Fitzpatrick

(uncredited)

Tom Gill

(uncredited)

Morland Graham

(uncredited)

Arthur Hambling

(uncredited)

Liane Haid

Aloysia

John Clifford

(uncredited)

Max Oldaker

Tenor

Fred Schwarz

Pawnbroker (uncredited)

Julie Suedo

Hans's Wife (uncredited)