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.
| Writing | Fausto Brizzi | Writer |
| Directing | Fausto Brizzi | Director |
| Writing | Franco Amurri | Original Film Writer |
| Camera | Federico Annicchiarico | Director of Photography |
| Editing | Luciana Pandolfelli | Editor |
| Art | Pasquale Tricoci | Production Design |
| Costume & Make-Up | Elena Minesso | Costumer |
| Sound | Andrea Bonini | Original Music Composer |
| Production | Roberto Proia | Producer |
| Sound | Bruno Zambrini | Original Music Composer |
| Writing | Franco Amurri | Co-Writer |
| Writing | Stefano Sudriè | Original Film Writer |
| Production | Gianluca Leurini | Executive Producer |
| Production | Andrea Goretti | Associate Producer |
| Production | Simone Bencini | Associate Producer |
| Sound | Fernando Alba | Music Producer |
| Art | Roberto Sileo | Set Decoration |
| Production | Stefano Rabbolini | Casting |
| Production | Edoardo Moracci | General Manager |
| Directing | Chiara della Longa | Assistant Director |
| Production | Ferdinando Cocco | Production Director |
| Sound | Fabio Felici | Sound |
| Sound | Francesco Vallocchia | Sound Mixer |
| Crew | Riccardo Gruppuso | Mix Technician |
| Sound | Thomas Giorgi | Sound Effects |
| Directing | Fabio Guaglione | Action Director |
| Directing | Emmanuele Bianco | Second Assistant Director |
| Crew | Monica Verzolini | Post Production Supervisor |
| Crew | Maria Gnecchi | Stunt Driver |
