Casting et équipe

Ellen BurstynChris MacNeil

Linda BlairRegan MacNeil

Jason MillerFather Damien Karras

Max von SydowFather Lankester Merrin

Lee J. CobbLt. Bill Kinderman

William O'MalleyFather Joseph Kevin Dyer

Kitty WinnSharon Spencer

Barton HeymanDr. Klein

Peter MastersonDr. Barringer

Jack MacGowranBurke Dennings

Rudolf SchündlerKarl

GP

Gina PetrushkaWilli

Robert SymondsDr. Taney

AS

Arthur StorchPsychiatrist

TB

Thomas BerminghamTom

Vasiliki MaliarosMary Karras

Τίτος ΒανδήςUncle John

John MahonLanguage Lab Director

Wallace RooneyBishop Michael

Ron FaberChuck / Demon (voice)

Donna MitchellMary Jo Perrin

Roy CooperJesuit Dean

Robert GerringerSenator at Party

Mercedes McCambridgeDemon (voice)

PB

Paul BatesonRadiologist's Assistant (uncredited)

EB

Elinore BlairNurse (uncredited)

William Peter BlattyThe Producer (uncredited)

Mary BoylanFirst Mental Patient (uncredited)

DC

Dick CallinanAstronaut (uncredited)

MC

Mason CurryDoctor (voice) (uncredited)

TD

Toni DarnayViolent psychotic patient (uncredited)

Eileen DietzDemon / Regan Double (uncredited)

JD

Joanne DusseauSenator's Wife (uncredited)

BE

Bernard EismannMinor Role (uncredited)

BH

Beatrice HunterMinor Role (uncredited)

YJ

Yvonne JonesBellevue Nurse (uncredited)

DL

Don LaBonteMinor Role (uncredited)

BL

Barton LaneAngiography Doctor (uncredited)

AM

Ann MilesSpiderwalk (uncredited)

JN

John NicolaPriest (uncredited)

VR

Vincent RussellSubway Vagrant (uncredited)

GF

Gerard F. YatesPriest Singing Around Piano at Party (uncredited)

Ρίτα Σακελλαρίου(her voice on the radio)