The Italy made Torino's move on Thursday and joined a fee of € 23 million plus € 2 million in bonuses.
Ricci, 23, has signed a deal until 2029 and told Milan's media channels: “There are so many emotions, I have never been so anxious in recent days.
“It goes without saying that this is an honor, because it is a huge club like Milan. On the other hand, there will be high expectations, it is an important season, so I will do my best to repay this faith that has been put into me.”
Asked for a favorite Rossonero player when he grew up, Ricci added: “Andrea Pirlo for his vision. Gennaro Gattuso for his strength. For his elegance and technology I choose Kaka.”