Robert Powell as Gustav Mahler

Georgina Hale as Alma Mahler

Lee Montague as Bernhard Mahler

Miriam Karlin as Aunt Rosa

Rosalie Crutchley as Marie Mahler

Richard Morant as Max

Angela Down as Justine Mahler

Ronald Pickup as Nick

Peter Eyre as Otto Mahler

Dana Gillespie as Anna von Mildenburg

David Collings as Hugo Wolfe

Kenneth Colley as Krenek

Antonia Ellis as Cosima Wagner

Oliver Reed as Train Conductor

Andrew Faulds as Doctor on Train

George Coulouris as Doctor Roth

Arnold Yarrow as Grandfather

Elaine Delmar as Princess

Otto Diamant as Professor Sladky

Berwick Kaler as Dancing Officer at Mahler's Cremation (uncredited)

Victoria Russell as Girl Running Alongside Train (uncredited)