Gelling Real's galacticos into a team capable of challenging for top honours will be the test Mourinho faces, but he insists he will relish the opportunity to work with players of the calibre of Ronaldo.
And Mourinho thinks that as long as the Ronaldo continues to produce the goods on the pitch, he is not worried about what the Portugal forward gets up to in his private life.
"Cristiano's a phenomenon," Mourinho said. "We are both Portuguese, he is the best player in the world and I am one of the best coaches in the world. I want a lot of goals from him next season.
"Nobody can criticise him if he's with Paris Hilton on holiday, or he goes to LA or he buys a Ferrari because someone who trains and plays as he does is from another planet. He is an historic footballer."