Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Superman | 1978 | |
| Writer | Superman 2. | 1980 | |
| Writer | Superman 3. | 1983 | |
| Writer | Bonnie és Clyde | 1967 | |
| Writer | Moonwalker - A holdjáró | 1988 | |
| Writer | Superman 2. - A Richard Donner-változat | 2006 | |
| Writer | Ki segít a Mikulásnak? | 1985 | |
| Writer | Ki segít a Mikulásnak? | 1985 | |
| Writer | Mi van, doki? | 1972 | |
| Writer | Sheena, a dzsungel királynője | 1984 | |
| Writer | Az éjszaka csendje | 1982 | |
| Writer | A rendszer ellensége | 2000 | |
| Actor | DeadTectives | 2018 | Lloyd |
| Writer | HIStory on Film, Volume II | 1997 | |
| Actor | Score: A Film Music Documentary | 2017 | Himself |
| Writer | It's a Bird, It's a Plane, It's Superman! | 1975 | |
| Writer | Volt egyszer egy gazember | 1970 | |
| Actor | T and T | Dick Decker | |
| Producer | 100 Bloody Acres | 2012 | |
| Producer | R.O.T.O.R. | 1987 | |
| Actor | Easy Riders, Raging Bulls | 2003 | Himself |
| Writer | Vadnyugati kalandorok | 1972 | |
| Actor | Conversations on Alex North's Spartacus: The Celebration of a Masterpiece | 2010 | David Newman |