Enrico is a struggling journalist in the Rome of 1945. He receives a phone call informing him that his younger brother Lorenzo has died. Enrico recalls their long and difficult relationship; he was brought up by their poor but warm-hearted grandmother, Lorenzo was raised as a gentleman by a wealthy local aristocrat. Reunited in the Florence of the 1930s, Enrico becomes his spoilt brother's keeper, forever haunted by a sense of guilty responsibility towards a man he both hates and loves.
Unfortunately the movie Family Diary is not yet available on HBO Max.
| Directing | Valerio Zurlini | Director |
| Production | Marco Veiss | Production Secretary |
| Art | Flavio Mogherini | Production Design |
| Sound | Giovanni Rossi | Sound |
| Writing | Valerio Zurlini | Screenplay |
| Sound | Goffredo Petrassi | Original Music Composer |
| Production | Giorgio Adriani | Production Manager |
| Camera | Enrico Cignitti | Camera Operator |
| Production | Antonio Guadagnino | Production Secretary |
| Directing | Graziolina Campori | Script Supervisor |
| Editing | Giorgio Serrallonga | Assistant Editor |
| Writing | Mario Missiroli | Screenplay |
| Production | Goffredo Lombardo | Producer |
| Writing | Vasco Pratolini | Novel |
| Directing | Piero Schivazappa | First Assistant Director |
| Costume & Make-Up | Amalia Paoletti | Hairstylist |
| Costume & Make-Up | Rino Carboni | Makeup Artist |
| Art | Emilio D'Andria | Set Decoration |
| Production | Claudio Agostinelli | Unit Manager |
| Camera | Giuseppe Rotunno | Director of Photography |
| Costume & Make-Up | Gaia Romanini | Costume Design |
| Editing | Mario Serandrei | Editor |
| Camera | Angelo Novi | Still Photographer |