Jules Buck (30 July 1917, St Louis, Missouri – 19 July Paris, France 2001) was an American producer of films. He was cameraman for John Huston's war documentaries and began producing as assistant to Mark Hellinger. In 1952 he moved to Paris, then London, where he created, in association with Peter O'Toole, the company Keep Films, which produced movies such as Lord Jim (1963), Becket (1963), and What's New Pussycat? (1965). From his 1945 marriage to actress Joyce Gates (née Joyce Ruth Getz), Buck had one child, journalist Joan Juliet Buck.