| Dennis Price |
Louis Mazzini |
| Dennis Price |
Mazzini's Father |
| Valerie Hobson |
Edith D'Ascoyne |
| Joan Greenwood |
Sibella Holland |
| Alec Guinness |
The Duke D'Ascoyne |
| Alec Guinness |
The Banker D'Ascoyne |
| Alec Guinness |
The Parson D'Ascoyne |
| Alec Guinness |
The General D'Ascoyne |
| Alec Guinness |
The Admiral D'Ascoyne |
| Alec Guinness |
Young Ascoyne D'Ascoyne |
| Alec Guinness |
Young Henry D'Ascoyne |
| Alec Guinness |
Lady Agatha D'Ascoyne |
| Audrey Fildes |
Mama |
| Miles Malleson |
Mr. Elliott, The Hangman |
| Clive Morton |
Colonel, The Prison Governor |
| Cecil Ramage |
Crown Counsel |
| John Penrose |
Lionel Holland |
| Hugh Griffith |
Lord High Steward |
| John Salew |
Mr. Perkins |
| Eric Messiter |
Inspector Burgoyne |
| Lyn Evans |
The Farmer |
| Barbara Leake |
Miss Waterman, The Schoolmistress |
| Peggy Ann Clifford |
Maud Redpole |
| Anne Valery |
Clothilde, The Girl in the Punt |
| Arthur Lowe |
Titbits Reporter |
| Laurence Naismith |
1st Warder |
| Stanley Beard |
5th Warder |
| Maxwell Foster |
6th Warder |
| Jeremy Spenser |
Louis as a Child |
| David Preston |
Lionel as a Child |
| Carol White |
Sibella as a Child |
| Cavan Malone |
Graham as a Child |
| Ian Collins |
Dr. Hallward |
| Harold Young |
Captain |
| Molly Hamley-Clifford |
Lady Redpole |
| Leslie Handford |
Hoskins, The Gamekeeper |
| Gordon Phillott |
Parliamentary Clerk |
| Richard Wattis |
Louis's Counsel |
| Fletcher Lightfoot |
1st Peer |
| Peter Gawthorne |
2nd Peer |
| Ivan Staff |
Valuer |
| Nicholas Hill |
Serjeant at Arms |
| Anthony Adam |
Actor |