Ronaldo, 33, completed a reported €100million move from Real Madrid to Turin on Tuesday, ending a highly successful nine-year career with the LaLiga giants.
The transfer fee was not disclosed but Spanish media said Ronaldo had signed a four-year deal and had cost Juventus 105 million euros ($123.24 million).
He wrote: "I believe that the time has come to begin a new stage in my life and that is why I have asked the club to accept my transfer request".
"Real Madrid has conquered my heart, and that of my family, and that is why more than ever I want to say thank you".
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The move, while not completely surprising, throws doubt on to how secure the government's Brexit strategy is. There are now only two ministers remaining in the Department for Exiting the European Union.
Ronaldo heads to Italy as Madrid's all-time leading goalscorer with an astonishing 450 goals from 438 games, including 44 hat-tricks.
Belgium turned around a 2-0 deficit to beat Japan 3-2 in the round of 16 and then followed that up with a 2-1 win over five-time World champions Brazil in the quarter-finals. "Apart from the titles he has lifted, the honours secured and the on-field achievements during these nine years, Cristiano Ronaldo has been a role model in terms of commitment, hard work, responsibility, talent and self-improvement".
Juventus hasn't won a UEFA Champions League trophy (the equivalent of a World Cup trophy for club soccer) since 1996. He later played down the comment, but doubts over his future at Madrid lingered, especially after he had also threatened to leave the previous year.
Based on Wahl's report, it appears talks have already been held with Neymar, that despite the fact he only joined PSG last summer in a world-record deal.
How to Watch England vs Colombia Live Online in USA
England beat Tunisia and Panama as expected, and then lost against Belgium in the battle of the "B" teams. Jordan Henderson's effort was saved by David Ospina , but Bacca and Mateus Uribe missed for Colombia .
At the last count, most fans were eagerly checking their twitter feeds for updates on Ronaldo's intending move.
Ronaldo departs Real after three years.
The aforementioned source is also reporting that Real won't be chasing a new goalkeeper this season either. Both players pushing each other to become better than they otherwise could have been.
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