| È l'amor che mi rovina | 1951 | Screenplay |
| Les Sorcières | 1967 | Screenplay |
| Toby Dammit | 1968 | Writer |
| Caprice à l'italienne | 1968 | Writer |
| Histoires extraordinaires | 1968 | Screenplay |
| Ciel de plomb | 1968 | Screenplay |
| Fellini Satyricon | 1969 | Screenplay |
| Viva Cangaçeiro | 1969 | Screenplay |
| La moglie del prete | 1970 | Screenplay |
| Roma | 1972 | Screenplay |
| Mordi e fuggi | 1973 | Writer |
| Polvere di stelle | 1973 | Screenplay |
| Les Frissons de l'angoisse | 1975 | Screenplay |
| Léonor | 1975 | Writer |
| Le Canard à l'orange | 1975 | Screenplay |
| La Carrière d'une femme de chambre | 1976 | Screenplay |
| E tanta paura | 1976 | Writer |
| Languidi baci... perfide carezze | 1976 | Writer |
| Le Casanova de Fellini | 1976 | Screenplay |
| Âmes perdues | 1977 | Screenplay |
| Les Nouveaux Monstres | 1977 | Screenplay |
| Le Grand Embouteillage | 1979 | Screenplay |
| Cher Papa | 1979 | Screenplay |
| La Cité des femmes | 1980 | Screenplay |
| Habibi, amor mío | 1981 | Writer |
| Fantôme d’amour | 1981 | Screenplay |
| Piso pisello | 1981 | Screenplay |
| Les derniers monstres | 1982 | Screenplay |
| Dio li fa poi li accoppia | 1982 | Screenplay |
| State buoni se potete | 1983 | Screenplay |
| Questo e quello | 1983 | Writer |
| Lui è peggio di me | 1985 | Screenplay |
| Sono un fenomeno paranormale | 1985 | Screenplay |
| Rimini Rimini | 1987 | Screenplay |
| Roba da ricchi | 1987 | Screenplay |
| Teresa | 1987 | Writer |
| Valse d'amour | 1991 | Screenplay |
| Paprika | 1991 | Screenplay |
| All Ladies do it | 1992 | Screenplay |
| Miracolo italiano | 1994 | Screenplay |
| Giovani e belli | 1996 | Writer |
| Fate un bel sorriso | 2000 | Writer |
