Ellen Burstyn

Chris MacNeil

Linda Blair

Regan MacNeil

Jason Miller

Father Damien Karras

Max von Sydow

Father Lankester Merrin

Lee J. Cobb

Lt. Bill Kinderman

William O'Malley

Father Joseph Kevin Dyer

Kitty Winn

Sharon Spencer

Jack MacGowran

Burke Dennings

Barton Heyman

Dr. Klein

Peter Masterson

Dr. Barringer

Rudolf Schündler

Karl

Gina Petrushka

Willi

Robert Symonds

Dr. Taney

Arthur Storch

Psychiatrist

Thomas Bermingham

Tom

Vasiliki Maliaros

Mary Karras

Titos Vandis

Uncle John

John Mahon

Language Lab Director

Wallace Rooney

Bishop Michael

Ron Faber

Chuck / Demon (voice)

Donna Mitchell

Mary Jo Perrin

Roy Cooper

Jesuit Dean

Robert Gerringer

Senator at Party

Mercedes McCambridge

Demon (voice)

William Peter Blatty

The Producer (uncredited)

Mary Boylan

First Mental Patient (uncredited)

Eileen Dietz

Demon / Regan Double (uncredited)

Ρίτα Σακελλαρίου

(her voice on the radio)