John Robert Stillman (July 11, 1946 – April 7, 2009), billed professionally as Jack Wrangler, was an American gay pornographic film actor, theatrical producer, director, and writer. He performed in both gay and straight films.

Open about his homosexuality and adult film work throughout his career, Wrangler was an icon of the gay-liberation movement. The 2008 feature-length documentary Wrangler: Anatomy of an Icon examines his life and career.