The 30-year-old has enjoyed a remarkable career at Old Trafford and looks set to play a vital role under the Portuguese boss this season.
Speaking about Rooney, Mourinho revealed he tried to lure him to Chelsea during his time in charge at Stamford Bridge.
“You know, I follow from the outside but close because the season he joined Manchester United is the season I came to England for the first time, 2004,” he said.
“I’ve been here already for two different periods and I was close to it. I can say, because everybody knows, I tried to buy him.
“He is a player I always wanted to have in my side. Finally, I have him and I have him in the club he loves, the club where he has spent the best years of his career. And, I think, the best is yet to come from him.
“I find him full of motivation, full of joy to work every day, and happy to be here as a leader for the young people. He’s my man too. I can say, at this moment, he is my man. I am really happy. I hope he has a great night and he forgives me when I change him. I am going to change him because we have a match on Sunday!”
He moved to a deeper midfield role under Louis van Gaal last season and also featured in the centre of the pitch for Roy Hodgson’s England side, however Mourinho has been vocal of his plans for Rooney up front.
Rooney was able to link up with Zlatan Ibrahimovic against Everton and they both showed plenty of positives for the new season, despite not being able to find the back of the net at Old Trafford.
Mourinho has continuously stated Rooney will play a big part next season and fans will be looking forward to see what the Portuguese boss has in mind.