Manchester United have confirmed the signing of Henrikh Mkhitaryan from Borussia Dortmund on a four-year deal with the option of a further year.

The 27-year-old was one of Dortmund's star performers last season, scoring 23 goals and registering 32 assists in all competitions, earning him the Bundesliga Player of the Season award.

The Armenia international had been heavily linked with a move to Old Trafford this summer, and reportedly tried to force through the deal himself after it had seemingly stalled in recent days.

"I am very proud to join Manchester United, this move is a dream come true for me. I am excited to play for a club with such an illustrious history and hope to be part of it for a long time," he told the club's official website.

"I thank the trust the club and Jose Mourinho have put in me. Finally, I believe playing for such a great club honours my father's memory, and the inspiration and drive he gave to me when I was young."

Manager Mourinho added: "Henrikh is a very talented footballer who has been in such prolific form for both his club and his country. He is a real team player with great skill, vision and also has a good eye for goal.

"I am delighted he has chosen to sign for United. I believe he will make an impact on the team very quickly as his style of play is suited to the Premier League. We are all looking forward to working with him."

Mkhitaryan scored 41 goals in 140 appearances during his three-year spell at the Westfalenstadion.

Mourinho has now made three signings since arriving at the club, also bringing Eric Bailly and Zlatan Ibrahimovic to Old Trafford.