The Portuguese international, who became a cult hero in his first spell with Manchester United between 2003 and 2009, has re-signed on a two-year deal.
Ronaldo has brought the curtain down on his three-year stint at Juve by re-joining United in a £20 million ($28m) deal, committing to a two-year contract with Ole Gunnar Solskjaer’s side.
The Red Devils also have the option to extend that agreement by an extra year, with the 36-year-old set to join up with his new team-mates in Manchester after the international break.
Cristiano Ronaldo is delighted after sealing his return to Old Trafford from Juventus, he said “Manchester United has always had a special place in my heart”.
Ronaldo began his first career at United in 2003, signing from Sporting CP for just £12m ($17m).
The impulsive striker went on to help the Red Devils win three Premier League titles and the Champions League among a whole host of other honours in the process he also picked up the first Ballon d’Or award of his career at Old Trafford.
When Ronaldo eventually left Manchester to join Real Madrid in 2019 he had 118 goals and 69 assists to his name from 292 appearances.
The former Real Madrid Striker could be available to make his second debut for the club when they host Newcastle on September 11.