A 1973 horror film directed by William Friedkin, starring Ellen Burstyn and Linda Blair. A young girl is possessed by a demon, and two priests attempt to exorcise it.
I will tell you for me it remains to be The Exorcist. And I appreciate how scary I find it that I will infrequently watch it because I never want that to wear off because I've seen so many horror movies at this point.
""The Exorcist is mentioned as the scariest movie of all time and is praised for its inescapable horror and cultural impact."