Marco, Tato, Serena, and Leo are nine years old, and they are inseparable friends, ready to defend each other from their schoolmates’ bullying. On the evening of Marco's birthday, all four find themselves together to blow out the candles and unknowingly make the same wish: become adults. In one night's time, they find themselves magically the same age as their parents, but with the same behaviour and thoughts they have as kids.
Unfortunately the movie Da grandi is not yet available on HBO Max.
| Sound | Andrea Bonini | Original Music Composer |
| Writing | Fausto Brizzi | Writer |
| Camera | Federico Annicchiarico | Director of Photography |
| Production | Roberto Proia | Producer |
| Editing | Luciana Pandolfelli | Editor |
| Directing | Fausto Brizzi | Director |
| Art | Pasquale Tricoci | Production Design |
| Sound | Bruno Zambrini | Original Music Composer |
| Writing | Franco Amurri | Original Film Writer |
| Costume & Make-Up | Elena Minesso | Costumer |
| Writing | Stefano Sudriè | Original Film Writer |
| Production | Gianluca Leurini | Executive Producer |
| Production | Simone Bencini | Associate Producer |
| Crew | Riccardo Gruppuso | Mix Technician |
| Writing | Franco Amurri | Co-Writer |
| Directing | Emmanuele Bianco | Second Assistant Director |
| Art | Roberto Sileo | Set Decoration |
| Production | Ferdinando Cocco | Production Director |
| Sound | Thomas Giorgi | Sound Effects |
| Production | Edoardo Moracci | General Manager |
| Production | Andrea Goretti | Associate Producer |
| Directing | Fabio Guaglione | Action Director |
| Production | Stefano Rabbolini | Casting |
| Directing | Chiara della Longa | Assistant Director |
| Sound | Fabio Felici | Sound |
| Sound | Francesco Vallocchia | Sound Mixer |
| Sound | Fernando Alba | Music Producer |
| Crew | Monica Verzolini | Post Production Supervisor |
| Crew | Maria Gnecchi | Stunt Driver |
