Exorcist II: The Heretic is a 1977 American supernatural science fiction horror film directed by John Boorman and written by William Goodhart. It is the second installment in The Exorcist film series and the sequel to The Exorcist (1973), and stars Linda Blair, Richard Burton, Louise Fletcher, Max von Sydow, Kitty Winn, Paul Henreid, and James Earl Jones. It was the last film to feature veteran actor Paul Henreid. Set four years after the previous film, the film centers on the now 16-year-old Regan MacNeil, who is still recovering from her previous demonic possession.

Exorcist II: The Heretic was released in the United States on June 17, 1977, by Warner Bros. The film received generally negative reviews from critics and is often considered to be one of the worst films ever made. Despite earning over $30 million domestically against a $14 million production budget, the negative reception meant that the next film in The Exorcist series would not come until The Exorcist III in 1990.