Chris MacNeil
Regan MacNeil
Father Damien Karras
Father Lankester Merrin
Lt. Bill Kinderman
Father Joseph Kevin Dyer
Sharon Spencer
Burke Dennings
Dr. Klein
Dr. Barringer
Karl
Willi
Dr. Taney
Psychiatrist
Tom
Mary Karras
Uncle John
Language Lab Director
Bishop Michael
Chuck / Demon (voice)
Mary Jo Perrin
Jesuit Dean
Senator at Party
Demon (voice)
Radiologist's Assistant (uncredited)
Nurse (uncredited)
The Producer (uncredited)
First Mental Patient (uncredited)
Astronaut (uncredited)
Doctor (voice) (uncredited)
Violent psychotic patient (uncredited)
Demon / Regan Double (uncredited)
Senator's Wife (uncredited)
Minor Role (uncredited)
Bellevue Nurse (uncredited)
Angiography Doctor (uncredited)
Spiderwalk (uncredited)
Priest (uncredited)
Subway Vagrant (uncredited)
Priest Singing Around Piano at Party (uncredited)
(her voice on the radio)