Michael Grais is an American screenwriter and producer best known for his long-standing collaboration with Mark Victor. Together, they wrote the screenplay for Poltergeist, receiving a Saturn Award nomination, and went on to create and write films including Poltergeist II: The Other Side, Cool World, and Marked for Death. In addition to feature films, Grais has worked in television as a writer and producer, contributing to a variety of dramatic and genre projects. His work, particularly on the Poltergeist franchise, has established him as a notable figure in American horror and fantasy cinema.