Lee Remick
Katherine Thorn
David Warner
Keith Jennings
Billie Whitelaw
Mrs. Baylock
Harvey Stephens
Damien Thorn
Patrick Troughton
Father Brennan
Martin Benson
Father Spiletto
Anthony Nicholls
Dr. Becker
Don Fellows
Thorn's Second Aide
Patrick McAlinney
Photographer
Betty McDowall
American Secretary
Burnell Tucker
Secret Service Man (uncredited)
Ronald Leigh-Hunt
Gentleman at Rugby Match (uncredited)
Guglielmo Spoletini
Italian Taxi Driver (uncredited)
Freda Dowie
Nun (uncredited)
Ya'ackov Banai
Arab (uncredited)
Harvey Bernhard
Man walking across street (uncredited)
Michael Byrne
Monk (uncredited)
Leo McKern
Carl Bugenhagen (uncredited)
Bill Reimbold
General (uncredited)
Michael Leader
Rugby Match Spectator (uncredited)
Mary Burleigh
Rugby Match Spectator (uncredited)
Ann Barrass
Guest at Damien’s birthday party
Mark Baxter
Boy (uncredited)
Victor Harrington
Monk (uncredited)
Suzanne Heimer
Rugby match spectator
Walter Henry
Hospital Orderly
Trevor Wedlock
Man buying ice cream at Safari Park (uncredited)
