Rasmus Hojlund has joined Manchester United on a contract running until June 2028, with the option of a further year, subject to international clearance.
The agreement to recruit him from Atalanta has cost United an initial £64m, plus £8m in add-ons.
At the age of just 20, the striker has scored 27 goals in 87 club appearances, including 10 in Italy for Atalanta last season. Already a senior international, Hojlund has scored six goals in his six appearances for Denmark.
Rasmus Hojlund said: “It is no secret that I have been a fan of this great club since I was a small boy, and I dreamed of walking out at Old Trafford as a Manchester United player.
“I am incredibly excited by this opportunity to turn that dream into a reality, and I am determined to repay the faith that the club has shown in me. It is still early in my career, but I know that I am ready to make this step up and play with this group of world-class players.
“Once I had spoken to the manager, I knew that this environment would be perfect for my development; I am relishing the opportunity to work with one of the best coaches in the world. Under his guidance and support I know that I am capable of achieving great things together with my new teammates at this special club.”