Gregory Peck

Character: Robert Thorn

Lee Remick

Character: Katherine Thorn

David Warner

Character: Keith Jennings

Billie Whitelaw

Character: Mrs. Baylock

Harvey Stephens

Character: Damien Thorn

Patrick Troughton

Character: Father Brennan

Martin Benson

Character: Father Spiletto

Robert Rietti

Character: Monk

Tommy Duggan

Character: Priest

John Stride

Character: Psychiatrist

Holly Palance

Character: Young Nanny

Anthony Nicholls

Character: Dr. Becker

Roy Boyd

Character: Reporter

Sheila Raynor

Character: Mrs. Horton

Robert MacLeod

Character: Horton

Bruce Boa

Character: Thorn's Aide

Don Fellows

Character: Thorn's Second Aide

Patrick McAlinney

Character: Photographer

Dawn Perllman

Character: Chambermaid

Nancy Mannigham

Character: Nurse

Miki Iveria

Character: First Nun

Betty McDowall

Character: American Secretary

Nicholas Campbell

Character: Marine

Burnell Tucker

Character: Secret Service Man (uncredited)

Ronald Leigh-Hunt

Character: Gentleman at Rugby Match (uncredited)

Guglielmo Spoletini

Character: Italian Taxi Driver (uncredited)

Freda Dowie

Character: Nun (uncredited)

Ya'ackov Banai

Character: Arab (uncredited)

Harvey Bernhard

Character: Man Walking across Street (uncredited)

Michael Byrne

Character: Monk (uncredited)

Leo McKern

Character: Carl Bugenhagen (uncredited)

Bill Reimbold

Character: General (uncredited)

Michael Leader

Character: Rugby Match Spectator (uncredited)

Mary Burleigh

Character: Rugby Match Spectator (uncredited)

Ann Barrass

Character: Guest at Damien’s Birthday Party

Mark Baxter

Character: Boy (uncredited)

Victor Harrington

Character: Monk (uncredited)

Suzanne Heimer

Character: Rugby Match Spectator

Walter Henry

Character: Hospital Orderly

Trevor Wedlock

Character: Man Buying Ice Cream at Safari Park (uncredited)