50,000 Real Madrid supporters turned out at the Santiago Bernabeu to welcome Eden Hazard to the club.
Florentino Perez said that Hazard's signing reflected the stature of the club.
"Today is a very special day for Real Madrid. A marvellous player who is capable of doing amazing things is coming. The legend of Madrid must continue with the best players in the world and we've wanted to say these words for a long time: today Eden Hazard joins Real Madrid. This is where you have to be," said Perez.
Hazard said that he wants to play either on the left wing or as a #10.
He added that he wants to be the best player in the world with the club.
"I will try to be the best in the world, yes. But first, I want us to be the best team and winning titles. It's a new challenge for me and I'm prepared for it. The Ballon d'Or is at Real Madrid this year with Luka Modric. I don't know if it's easier to win it at Real Madrid, even though lots of Real Madrid players have won it. But I'm focussing on the collective aspect," added Hazard.