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