William Peter Blatty: William Peter Blatty. Writer: The Exorcist. William Peter Blatty was born on 7 January 1928 in New York City, New York, USA. He was a writer and actor, known for The Exorcist (1973), The Exorcist III (1990) and The Ninth Configuration (1980). He was married to Julie Alicia Witbrodt, Linda Blatty, Elizabeth Gilman and Mary Margaret Rigard. He died on 12 January 2017 in Bethesda, Maryland, USA.
