Buy The Exorcist: Read 1582 Movies & TV Reviews - Amazon. The Exorcist - Warner Bros. - Movies, Novelist William Peter Blatty based his best-seller on the last known Catholic-sanctioned exorcism in the United States. Blatty transformed the little boy in the 1949 incident into a little girl named Regan, played by 14-year-old Linda Blair, The Exorcist (1973) - Rotten Tomatoes. The Exorcist (TV Series 2016–2018) - IMDb, The Exorcist (1973) - IMDb, The Exorcist (1973) - Rotten Tomatoes..