D.M. Marshman Jr. was born on December 21, 1922 in Cleveland, Ohio, USA. He was a writer, known for Sunset Boulevard (1950), Taxi (1953) and Second Chance (1953). He was married to Ann Chase Lane. He died on September 17, 2015 in Stamford, Connecticut, USA.
After his sojourn in Hollywood, Marshman moved into advertising. He was a longtime resident of Darien, Connecticut, keeping his Oscar on a bookshelf at his home.
Prior to his work as a a screenwriter, Marshman was an influential film critic for Life magazine.