William Gordon Amerson (December 22, 1938 – March 2015) was an American former adult-film industry pioneer, mogul, producer and actor in the late 1960s to the late 1980s. Born in Los Angeles, Bill Amerson was one of the first adult film producers in the United States to produce so-called "hard core" entertainment. As reported in the documentary Wadd: The Life & Times of John C. Holmes, produced by filmmaker Cass Paley, "In these films we showed insertion. The sexual penetration and oral copulation. We actually showed it. People could not turn their money over fast enough [to see it]." To Amerson's surprise the market for this product was vastly larger than he had expected.