William Friedkin Director
Max von Sydow Father Lankester Merrin
Louis DiGiaimo Casting
William A. Farley Hairstylist
Ellen Burstyn Chris MacNeil
Juliet Taylor Casting
Linda Blair Regan MacNeil
Lee J. Cobb Lt. Bill Kinderman
Rick Baker Special Effects Assistant
Donna Mitchell Mary Jo Perrin
Titos Vandis Uncle John
Mercedes McCambridge Demon (voice)
Robert Symonds Dr. Taney
William Peter Blatty The Producer (uncredited), Novel, Screenplay, Producer
John Mahon Language Lab Director
Jason Miller Father Damien Karras
Dan Perri Title Designer
Chris Newman Sound
Kitty Winn Sharon Spencer
Rudolf Schündler Karl
Bud S. Smith Editor
Barton Heyman Dr. Klein
Mason Curry Doctor (voice) (uncredited)
Roy Cooper Jesuit Dean
Jack Nitzsche Original Music Composer
Eileen Dietz Demon / Regan Double (uncredited)
Jack MacGowran Burke Dennings
Mary Boylan First Mental Patient (uncredited)
William O'Malley Father Joseph Kevin Dyer
Peter Masterson Dr. Barringer
Dick Smith Makeup Artist
Wallace Rooney Bishop Michael
Noel Marshall Executive Producer
Josh Weiner Still Photographer
David Salven Associate Producer
Dick Callinan Astronaut (uncredited)
Gina Petrushka Willi
Nessa Hyams Casting
David Wynn-Jones Focus Puller
Elinore Blair Nurse (uncredited)
Charles Bailey Assistant Art Director
Nicholas Sgarro Script Supervisor
Edward Garzero Scenic Artist
Joanne Dusseau Senator's Wife (uncredited)
Owen Roizman Director of Photography
Evan A. Lottman Editor
Arthur Storch Psychiatrist
Jerry Wunderlich Set Decoration
Eugene Marks Music Editor
Joseph M. Caracciolo Property Master
Thomas Bermingham Tom
Hal Landaker Sound
Fred J. Brown Sound Effects Editor
Vasiliki Maliaros Mary Karras
Paul Bateson Radiologist's Assistant (uncredited)
Ross Taylor Sound Effects Editor
Bernard Eismann Minor Role (uncredited)
Richard Quinlan Gaffer
Toni Darnay Violent psychotic patient (uncredited)
Robert Gerringer Senator at Party
Terence A. Donnelly First Assistant Director
Bill Malley Production Design
Ron Faber Chuck / Demon (voice)
Norman Gay Editor
Marcel Vercoutere Special Effects
Vincent Russell Subway Vagrant (uncredited)
Yvonne Jones Bellevue Nurse (uncredited)
Beatrice Hunter Minor Role (uncredited)
Rita Sakellariou (her voice on the radio)
Ann Miles Spiderwalk (uncredited), Stunts
John Nicola Priest (uncredited), Technical Advisor
Joe Fretwell Costume Design