Real's all-time top scorer, Ronaldo is reported to have signed a four-year contract that will see him pocket €30 million (£26.5m/$35m) per season.
"For Real Madrid, Cristiano Ronaldo will always be one of its greatest symbols and a unique reference for the generations to come", European champions Real said, adding that Ronaldo had asked to be transferred.
Marco Asensio won't be leaving Real Madrid for Liverpool FC in the summer transfer window, according to the Spain international's agent.More news: Economic Preview: There's only one dark cloud over the USA economy today
And the Argentine played an integral role in Juve's domestic league and cup double last season with 23 goals and seven assists in 37 appearances.
The Portugal worldwide scored two goals against Juventus in Real's 4-1 win in the 2017 Champions League final and earlier this season struck a jaw-dropping bicycle kick against the Italians in a 3-0 win in a quarter-final first-leg game in Turin which prompted Juve supporters to give him a standing ovation.
But they are not the only ones with faith in one of the best players of all time, with Juventus' shares on the stock exchange spiking by nearly 40 per cent since rumours of Ronaldo's arrival first surfaced on June 28, and by 5.7 per cent yesterday alone.More news: King, Queen of Belgium, Macron to attend World Cup semi-final
"It is true that [Zidane] is special, but Madrid makes everyone dream".
Ronaldo ended his letter saying thanks to everyone and, of course, as he said that first time in the stadium nine years ago, 'Hala Madrid!' Ronaldo, after all, held the Ballon d'Or five times (tied for the most ever with Lionel Messi), graced the covers of glossy magazines, has probably dated more supermodels than there are days in a year, and won almost every major trophy that's been created to honor the best players and teams in the world's most popular sport.
He will also be hoping to take the lead later this year in his personal race with Barcelona forward Lionel Messi for most Ballon d'Or awards, although fans will now have fewer on-field battles between the two to enjoy.More news: Judge cites 'real progress' in reuniting migrant families