Frank D. Gilroy is an American screenwriter, producer, novelist who well known for his works in The Fastest Gun Alive, From Noon Till Three. He has been worked for more than 38 films as a writer and also produced 3 films in his career. He also received Tony award for best play for The subject was roses. Some of his most popular credits include The Luckiest Man in the World, The Subject Was Roses, Playhouse 90.