The midfielder, who turned 18 on Sunday, is currently part of the Italian club's youth setup.
The new and improved contract means that Cristante will be promoted to the Milan first-team squad next season.
Milan are currently third in Serie A with 48 points from 27 matches.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Napoli | 19 | 14 | 2 | 3 | 30 | 12 | 18 | 44 |
| 2 | Atalanta BCAtalanta | 18 | 13 | 2 | 3 | 43 | 20 | 23 | 41 |
| 3 | Inter Milan | 17 | 12 | 4 | 1 | 45 | 15 | 30 | 40 |
| 4 | Lazio | 19 | 11 | 2 | 6 | 33 | 27 | 6 | 35 |
| 5 | Juventus | 18 | 7 | 11 | 0 | 30 | 15 | 15 | 32 |
| 6 | Fiorentina | 18 | 9 | 5 | 4 | 31 | 18 | 13 | 32 |
| 7 | Bologna | 17 | 7 | 7 | 3 | 25 | 21 | 4 | 28 |
| 8 | AC Milan | 17 | 7 | 6 | 4 | 26 | 17 | 9 | 27 |
| 9 | Udinese | 19 | 7 | 4 | 8 | 23 | 28 | -5 | 25 |
| 10 | Roma | 19 | 6 | 5 | 8 | 26 | 24 | 2 | 23 |
| 11 | Torino | 19 | 5 | 6 | 8 | 19 | 24 | -5 | 21 |
| 12 | Empoli | 19 | 4 | 8 | 7 | 18 | 22 | -4 | 20 |
| 13 | Genoa | 19 | 4 | 8 | 7 | 16 | 27 | -11 | 20 |
| 14 | Parma | 19 | 4 | 7 | 8 | 25 | 34 | -9 | 19 |
| 15 | Hellas VeronaHellas Verona | 19 | 6 | 1 | 12 | 24 | 42 | -18 | 19 |
| 16 | Como | 18 | 4 | 6 | 8 | 20 | 30 | -10 | 18 |
| 17 | CagliariCagliari | 19 | 4 | 5 | 10 | 18 | 32 | -14 | 17 |
| 18 | Lecce | 19 | 4 | 5 | 10 | 11 | 31 | -20 | 17 |
| 19 | VeneziaVenezia | 19 | 3 | 5 | 11 | 18 | 32 | -14 | 14 |
| 20 | Monza | 19 | 1 | 7 | 11 | 17 | 27 | -10 | 10 |
| > Serie A Full Table | |||||||||
