“It’s another fun legacy to be a part of…That one is a lot of research, rather than just impulsive screenwriting. That’s one that you talk to a lot of people. You read a lot of books, and do a [lot] of interviews…It’s a lot more than I anticipated getting into it. And I guess I was naive to think that. But it was very exhilarating to be involved in a lot of those conversations that you find yourself in,” Green also mentioned while he talked about writing the upcoming sequel, which will be a collaboration between Blumhouse and Morgan Creek.

The original Exorcist was directed by William Friedkin and written by William Peter Blatty, who also scribed the 1971 book of the same name that the film is based on. The drama was a box office and critical hit upon its initial theatrical release, in part for its originality, performances and Friedkin’s direction.

The Exorcist is also known for turning actress Linda Blair into a household name. She famously portrayed the character of Regan, a teenage girl who required help from the title character after she became demonically possessed, in the movie.

Blair later reprised her famous role in the series’ first follow-up, Exorcist II: The Heretic, but has never returned to star in a subsequent sequel. Green, Blumhouse and Morgan Creek haven’t shared if the performer will return to the franchise, or any other casting news yet.