| In cerca di felicità | 1944 | Screenplay |
| La signora è servita | 1945 | Screenplay |
| Le miserie del signor Travet | 1945 | Screenplay |
| Le Bandit | 1946 | Screenplay |
| Fatalità | 1947 | Screenplay |
| Il passatore | 1947 | Screenplay |
| Come persi la guerra | 1947 | Screenplay |
| Sans pitié | 1948 | Screenplay |
| L'amore | 1948 | Screenplay |
| Au nom de la loi | 1949 | Screenplay |
| Le Moulin du Pô | 1949 | Screenplay |
| Le Chemin de l'Espérance | 1950 | Screenplay |
| Les Feux du music-hall | 1950 | Screenplay |
| Traqué dans la ville | 1951 | Screenplay |
| Cameriera bella presenza offresi... | 1951 | Screenplay |
| Le Cheik blanc | 1952 | Screenplay |
| Il brigante di Tacca del Lupo | 1952 | Screenplay |
| La Maison du silence | 1953 | Screenplay |
| Riscatto - Tu sei il mio giudice | 1953 | Screenplay |
| Fille d'amour | 1953 | Screenplay |
| L'Amour à la ville | 1953 | Writer |
| Pietà per chi cade | 1954 | Screenplay |
| La strada | 1954 | Screenplay |
| Les Amours de Manon Lescaut | 1954 | Screenplay |
| Il bidone | 1955 | Screenplay |
| Les Nuits de Cabiria | 1957 | Screenplay |
| Fortunella | 1958 | Screenplay |
| La dolce vita | 1960 | Screenplay |
| Adua et ses Compagnes | 1960 | Screenplay |
| Scano Boa | 1961 | Writer |
| Boccace 70 | 1962 | Screenplay |
| Le tentazioni del Dottor Antonio | 1962 | Screenplay |
| La Steppe | 1962 | Writer |
| Quand la chair succombe | 1962 | Writer |
| Huit et demi | 1963 | Screenplay |
| Violenza segreta | 1963 | Writer |
| Il gaucho | 1964 | Screenplay |
| Les Poupées | 1965 | Screenplay |
| Les Trois Visages | 1965 | Writer |
| Juliette des esprits | 1965 | Screenplay |
| Francesco d'Assisi | 1966 | Screenplay |
| L'immorale | 1967 | Screenplay |
| L'incoronazione di Carlo Magno | 1968 | Screenplay |
| Galileo | 1968 | Screenplay |
| Serafino | 1968 | Screenplay |
| Come, quando, perché | 1969 | Screenplay |
| Amore mio aiutami | 1969 | Screenplay |
| Échec à la reine | 1969 | Writer |
| Le castagne sono buone | 1970 | Screenplay |
| Alfredo, Alfredo | 1972 | Screenplay |
| Amore e ginnastica | 1973 | Writer |
| Vertiges | 1975 | Screenplay |
| Mes chers amis | 1975 | Screenplay |
| Voyage avec Anita | 1979 | Screenplay |
| Le marquis s'amuse | 1981 | Screenplay |
| La voce | 1982 | Writer |
| Mes chers amis 2 | 1982 | Screenplay |
| Amici miei - Atto III° | 1985 | Screenplay |
| Ginger et Fred | 1986 | Screenplay |
| Pourvu que ce soit une fille | 1986 | Screenplay |
| Cino, l’enfant qui traversa la montagne | 2014 | Writer |
