Louis Mazzini / His Father
Dennis Price
The D'Ascoyne Family: The Duke / The Banker / The Parson / The General / The Admiral / Young Ascoyne / Young Henry / Lady Agatha
Alec Guinness
Mr. Perkins
John Salew
Inspector Burgoyne
Eric Messiter
The Farmer
Lyn Evans
The Schoolmistress
Barbara Leake
Maud Redpole
Peggy Ann Clifford
The Girl in the Punt
Anne Valery
The Reporter
Arthur Lowe
First Lord Delivering Verdict (uncredited)
Peter Gawthorne
Lady Redpole (uncredited)
Molly Hamley-Clifford
Gamekeeper Hoskins (uncredited)
Leslie Handford
Sibella
Joan Greenwood
Young Graham (uncredited)
Cavan Malone
Young Louis (uncredited)
Jeremy Spenser
Young Sibella (uncredited)
Carol White
Warder in Jail (uncredited)
Laurence Naismith
Clerk of Parliament (uncredited)
Gordon Phillott
Defence Counsel (uncredited)
Richard Wattis
Captain (uncredited)
Harold Young
Edith D'Ascoyne
Valerie Hobson
Mama
Audrey Fildes
The Hangman
Miles Malleson
The Prison Governor
Clive Morton
Lionel Holland
John Penrose
Crown Counsel
Cecil Ramage
Lord High Steward
Hugh Griffith
Director
Robert Hamer
Screenplay
Music
Wolfgang Amadeus Mozart
Editorial Services
Seth Holt
Associate Producer
Michael Relph
Producer
Michael Balcon
Director of Photography
Douglas Slocombe
Novel
Roy Horniman
Editor
Peter Tanner
Original Music Composer
Ernest Irving
John Dighton
Production Supervisor
Hal Mason
Unit Production Manager
Leigh Aman
Assistant Editor
John Jympson
Nancy Mitford
Assistant Director
Norman Priggen
Hairstylist
Daphne Martin
Makeup Artist
Harry Frampton
Camera Operator
Jeff Seaholme
Costume Design
Anthony Mendleson
Pearl Orton
Ernest Taylor
Art Direction
William Kellner
Special Effects
Sydney Pearson
Roy Baker
Assistant Art Director
Bert Davey
Barbara Barnard
Sound Director
Stephen Dalby
Conductor
Geoffrey Dickinson
Continuity
Phyllis Crocker
Sound Recordist
John W. Mitchell
Philharmonia Orchestra