Russell Crowe plays a priest who really existed, Father Amorth, reputed to have been. Father Gabriele Amorth (1925-2016) really existed.
He was an exorcist of the diocese of Rome, and wrote many books, which sold very well. He also created the International Association of Exorcists! An extraordinary figure, we agree, which it is however possible to wonder if he was really as Russell Crowe interprets him on the screen. The performance of the young child, played by a 12-year-old kid, Peter DeSouza-Feighoney, also deserves a hat trick.