Mary Harron. Director: American Psycho. Mary Harron (born January 12, 1953) is a Canadian filmmaker and screenwriter. She gained recognition for her role in writing and directing several independent films, including I Shot Andy Warhol (1996), American Psycho (2000), and Bettie Page: Begehrt und berüchtigt (2005). She co-wrote American Psycho and The Notorious Bettie Page with Guinevere Turner. Although Harron has denied this title, she has been thought to be...