Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Frühstück bei Tiffany | 1961 | |
| Actor | Eine Leiche zum Dessert | 1976 | Lionel Twain |
| Writer | Schloss des Schreckens | 1961 | |
| Writer | Kaltblütig | 1967 | |
| Writer | Love, Marilyn | 2012 | |
| Writer | Schach dem Teufel | 1953 | |
| Actor | Truman Capote - Enfant terrible der amerikanischen Literatur | 2016 | Truman Capote |
| Actor | The Rolling Stones: Cocksucker Blues | 1972 | Himself |
| Writer | Rom, Station Termini | 1953 | |
| Writer | Die Grasharfe | 1995 |