Douglas Reed Ellin is an American podcaster, screenwriter and film and TV director, known best for creating the HBO television series Entourage. Ellin also served as executive producer, director, head writer and supporting actor for the series, and wrote, directed and produced its 2015 film adaptation. He attended Tulane University.

Entourage is an American comedy-drama television series that premiered on HBO on July 18, 2004, and ended on September 11, 2011, after eight seasons. The series was created and largely written by Doug Ellin and chronicles the acting career of Vincent Chase, a young A-list movie star, and his childhood friends from Queens, New York City, as they attempt to further their nascent careers in Los Angeles.