William Friedkin Director Ellen Burstyn Chris MacNeil Actor Linda Blair Regan Teresa MacNeil Actor Max von Sydow Father Lankester Merrin Actor Lee J. Cobb Lieutenant William Kinderman Actor Kitty Winn Sharon Spencer Actor Jack MacGowran Burke Dennings Actor Jason Miller Father Damien Karras Actor Reverend William O'Malley Father Dyer Actor Barton Heyman Dr. Klein Actor Peter Masterson Dr. Barringer, Clinic Director Actor Rudolf Schündler Karl Actor Gina Petrushka Willi Actor Robert Symonds Dr. Taney Actor Arthur Storch Psychiatrist Actor Reverend Thomas Bermingham Tom, President of University Actor Vasiliki Maliaros Karras' Mother Actor Titos Vandis Karras' Uncle Actor Wallace Rooney Bishop Michael Actor Ron Faber Chuck, Assistant Director, Demonic Voice Actor Donna Mitchell Mary Jo Perrin Actor Roy Cooper Jesuit Dean Actor Robert Gerringer Senator at Party Actor Mercedes McCambridge Pazuzu Voice Noel Marshall Executive Producer William Peter Blatty Producer Jack Nitzsche Original Music Owen Roizman Cinematographer Billy Williams Cinematographer Norman Gay Film Editing Evan A. Lottman Film Editing Bud S. Smith Film Editing Louis DiGiaimo Casting Nessa Hyams Casting Juliet Taylor Casting Bill Malley Production Design Terence A. Donnelly First Assistant Director Jerry Wunderlich Set Decoration John Robert Lloyd Art Director Joseph Fretwell III Costume Design