Gregory William Orr (born 6 August 1954) is an American writer and director of documentary and fiction films. He is the son of actress Joy Page and TV producer William T. Orr, and step-grandson of Jack L. Warner, one of the Warner Brothers.
Orr attended Boston University and the California Institute of the Arts, where he studied under film director Alexander Mackendrick.
In 1993 Orr produced his first documentary, Jack L. Warner: The Last Mogul, a feature-length biography of his mother's stepfather, the movie pioneer Jack L. Warner.
Orr's other films include Parole: Prison Without Bars (2000), The Day They Died (2003), Alone (2004, short), and Recreator (2011). As Recreator, later entitled, Cloned: The Recreator Chronicles (2012), marked the filmmaker's debut in feature-length, psychological thrillers.