The Exorcist (1973)

Talk about a horror classic! What could be scarier than a movie (loosely) based on real-life events? The Exorcist tells the story of Regan (Linda Blair), whose family feels that she’s been a little off lately. Concerned, her mother begins looking for help anywhere she can find it. Doctors are unable to find a solution, which leads her to a local priest. He agrees to help her, but has to break the news that Regan has likely been possessed by the devil himself…. Bad news, right? He calls in the help of other church officials to perform an exorcism on the girl -- madness ensues.