Gore Vidal
| Year | Movie | Function | Role |
| 2010 | Public Speaking | actor | (archive footage) |
| 2009 | Shrink | actor | George Charles |
| 2008 | Zero An Investigation Into 9-11 | actor | Himself |
| 2007 | Obscene | actor | Himself |
| 2006 | The U.S. vs. John Lennon | actor | Himself |
| 2005 | One Bright Shining Moment | actor | Himself |
| 2005 | Inside Deep Throat | actor | Himself |
| 2005 | Why We Fight | actor | Himself |
| 2004 | Thinking XXX | actor | Himself |
| 2003 | Sex at 24 Frames Per Second | actor | Himself (archive footage) |
| 2002 | Igby Goes Down | actor | First School Headmaster (uncredited) |
| 1997 | Gattaca | actor | Director Josef |
| 1997 | Shadow Conspiracy | actor | Congressman Page |
| 1994 | With Honors | actor | Prof. Pitkannan |
| 1992 | Bob Roberts | actor | Senator Brickley Paiste |
| 1990 | The Palermo Connection | writer | |
| 1987 | The Sicilian | writer | |
| 1979 | Caligula | writer | |
| 1972 | Roma | actor | Himself - Interviewé (uncredited) |
| 1970 | Myra Breckinridge | writer | |
| 1966 | Paris brûle-t-il ? | writer | |
| 1964 | Gore Vidal's The Best Man | writer | |
| 1964 | Gore Vidal's The Best Man | actor | Delegate (uncredited) |
| 1959 | Suddenly, Last Summer | writer | |
| 1959 | Suddenly, Last Summer | actor | Audience Member at Operation (uncredited) |
| 1959 | Ben-Hur | writer | |
| 1958 | The Left Handed Gun | writer |