After 50,000 turned out for the presentation of Brazilian playmaker Kaka last week, the club faithful began converging on the stadium around lunchtime to welcome the Portuguese international.
The huge arena in the centre of the Spanish capital again reverberated to the beat of rock music as a selection of Ronaldo's goals were replayed on a giant screen in the centre of the pitch.
VIDEO: Watch Ronaldo's unveiling in our Clip of the Day section
"I am very happy to be here," the World Player of the Year, clad in Real's all-white strip and his new number nine shirt, told fans.
"A childhood dream has come true for me, to come to Real Madrid. It's incredible that the stadium is full just for me," he added, before showing off his skills with the ball and greeting fans.
The 24-year-old, who joined Real from English champions Manchester United, is the jewel in the crown of Perez's self-styled "spectacular sporting project".
After bringing "galacticos" David Beckham, Zinedine Zidane and Luis Figo to the club during his previous term, Perez has spent around 215 million euros on Ronaldo, Kaka, French striker Karim Benzema and defender Raul Albiol.
At a news conference later on Monday with club director general Jorge Valdano, Ronaldo said he was proud to have become the world's most expensive player.
"If a club wants the best players it has to pay for it," he said. "I am happy to be the most expensive player in the world."
"This is a big challenge for me here. This is my life, my new house, my new club and I am going to give 100 percent for this club."
"Given that he is not yet at his peak and he is a very ambitious person there is no goal that he cannot achieve," Valdano said.
