Donald Seton Cammell was a Scottish painter, screenwriter, and film director. He has a cult reputation largely due to his debut film Performance, which he wrote the screenplay for and co-directed with Nicolas Roeg. He died by suicide after the last film he directed, Wild Side, was taken away from him and recut by the production company.

Performance is a 1970 British crime drama film directed by Donald Cammell and Nicolas Roeg, written by Cammell and filmed by Roeg. The film stars James Fox as a violent and ambitious London gangster who, after killing an old friend, goes into hiding at the home of a reclusive rock star.