Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Frukost på Tiffany's | 1961 | |
| Actor | Släpp deckarna loss, det är mord | 1976 | Lionel Twain |
| Writer | The Innocents | 1961 | |
| Writer | In Cold Blood | 1967 | |
| Writer | Love, Marilyn | 2012 | |
| Writer | Beat the Devil | 1953 | |
| Actor | Truman Capote - Enfant terrible der amerikanischen Literatur | 2016 | Truman Capote |
| Actor | The Rolling Stones: Cocksucker Blues | 1972 | Himself |
| Writer | Indiscretion of an American Wife | 1953 | |
| Writer | The Grass Harp | 1995 |