Gregory PeckRobert Thorn

Lee RemickKatherine Thorn

David WarnerKeith Jennings

Billie WhitelawMrs. Baylock

Harvey StephensDamien

Patrick TroughtonFather Brennan

Martin BensonFather Spiletto

Robert RiettiMonk

Tommy DugganPriest

John StridePsychiatrist

Holly PalanceYoung Nanny

Anthony NichollsDr. Becker

Roy BoydReporter

Sheila RaynorMrs. Horton

Freda DowieNun

Robert MacLeodHorton

Bruce BoaThorn's Aide

Don FellowsThorn's Second Aide

Patrick McAlinneyPhotographer

Dawn PerllmanChambermaid

Nancy MannighamNurse

Miki IveriaFirst Nun

Betty McDowallAmerican Secretary

Nicholas CampbellMarine

Burnell TuckerSecret Service Man

Ronald Leigh-HuntGentleman at Rugby Match

Guglielmo SpoletiniItalian Taxi Driver

Ya'ackov BanaiArab

Harvey Bernhard

Michael Byrne

Leo McKern

Bill Reimbold

Michael Leader

Mary Burleigh

Ann Barrass

Mark Baxter

Victor Harrington

Suzanne Heimer

Walter Henry

Trevor Wedlock

Richard DonnerDirector

David SeltzerScreenplay

Harvey BernhardProducer

Mace NeufeldExecutive Producer

Charles OrmeProducer