 | Robert Powell Gustav Mahler |
 | Georgina Hale Alma Mahler |
 | Lee Montague Bernhard Mahler |
 | Miriam Karlin Aunt Rosa |
 | Rosalie Crutchley Marie Mahler |
 | Richard Morant Max |
 | Angela Down Justine Mahler |
 | Ronald Pickup Nick |
 | Peter Eyre Otto Mahler |
 | Dana Gillespie Anna von Mildenburg |
 | David Collings Hugo Wolfe |
 | Kenneth Colley Krenek |
 | Antonia Ellis Cosima Wagner |
 | Oliver Reed Train Conductor |
 | Andrew Faulds Doctor on Train |
 | George Coulouris Doctor Roth |
 | Arnold Yarrow Grandfather |
| Elaine Delmar Princess |
| Otto Diamant Professor Sladky |
 | Berwick Kaler Dancing Officer at Mahler's Cremation (uncredited) |
| Victoria Russell Girl Running Alongside Train (uncredited) |
| Directing | |
| Ken Russell | Director |
Writing | |
| Ken Russell | Writer |
Production | |
| Roy Baird | Producer |
| Sanford Lieberson | Executive Producer |
| David Puttnam | Executive Producer |
Camera | |
| Dick Bush | Director of Photography |
Editing | |
| Michael Bradsell | Editor |
Art | |
| Ian Whittaker | Art Direction |
Costume & Make-Up | |
| Shirley Russell | Costume Design |
Editing | |
| Stuart Baird | Assistant Editor |
