Robert Thorn
Gregory Peck
Katherine Thorn
Lee Remick
Young Nanny
Holly Palance
Dr. Becker
Anthony Nicholls
Reporter
Roy Boyd
Mrs. Horton
Sheila Raynor
Horton
Robert MacLeod
Thorn's Aide
Bruce Boa
Thorn's Second Aide
Don Fellows
Photographer
Patrick McAlinney
Chambermaid
Dawn Perllman
Nurse
Nancy Mannigham
Keith Jennings
David Warner
First Nun
Miki Iveria
American Secretary
Betty McDowall
Marine
Nicholas Campbell
Secret Service Man (uncredited)
Burnell Tucker
Gentleman at Rugby Match (uncredited)
Ronald Leigh-Hunt
Italian Taxi Driver (uncredited)
Guglielmo Spoletini
Nun (uncredited)
Freda Dowie
Arab (uncredited)
Ya'ackov Banai
Man walking across street (uncredited)
Harvey Bernhard
Monk (uncredited)
Michael Byrne
Mrs. Baylock
Billie Whitelaw
Carl Bugenhagen (uncredited)
Leo McKern
General (uncredited)
Bill Reimbold
Rugby Match Spectator (uncredited)
Michael Leader
Damien
Harvey Stephens
Father Brennan
Patrick Troughton
Father Spiletto
Martin Benson
Monk
Robert Rietti
Priest
Tommy Duggan
Psychiatrist
John Stride
Art Direction
Carmen Dillon
Director
Richard Donner
Original Music Composer
Jerry Goldsmith
Editor
Stuart Baird
Stunts
Vic Armstrong
Stunt Coordinator
Alf Joint
Screenplay
David Seltzer
Producer
Executive Producer
Mace Neufeld
Charles Orme
Director of Photography
Gilbert Taylor
Casting
Maude Spector
Makeup Artist
Stuart Freeborn
Production Manager
Claude Hudson
Property Master
George Ball
John Chisholm
Assistant Director
David Tomblin
Steve Lanning
Set Dressing Artist
Tessa Davies
Assistant Art Director
George Richardson
Special Effects
John Richardson
George Gibbs
Camera Operator
Gerry Anstiss
Electrician
Peter Bloor
Costume Supervisor
Tiny Nicholls
Assistant Editor
Chris Ridsdale
Orchestrator
Arthur Morton
Additional Soundtrack
Lionel Newman
Location Manager
Bernard Hanson
Other
Elaine Schreyeck
Still Photographer
Bob Penn
Hairstylist
Pat McDermott