The Reincarnation of Peter Proud is a 1975 American psychological horror film directed by J. Lee Thompson, and starring Michael Sarrazin, Margot Kidder, and Jennifer O'Neill. It follows a university professor who, after experiencing a series of bizarre nightmares, comes to believe he is the reincarnation of someone else. It is based on the 1973 novel of the same title by Max Ehrlich, who adapted the screenplay.