Premier League: Cristiano Ronaldo dedicates Manchester United move to former boss, mentor Sir Alex Ferguson

Cristiano Ronaldo has declared he's back where he belongs, after re-joining Manchester United from Juventus on a two-year deal on Wednesday (NZ time), with the forward dedicating the move to his mentor Alex Ferguson.

Last week, United announced they had agreed a deal with Juventus to bring the 36-year-old back to Manchester, with the transfer now complete after the Portuguese forward passed a medical, secured a visa and agreed personal terms.

"Everyone who knows me, knows about my never ending love for Manchester United," Ronaldo wrote on Instagram. 

"The years I spent in this club were absolutely amazing and the path we've made together is written in gold letters in the history of this great and amazing institution."

"It's like a dream come true, after all the times that I went back to play against Man. United, and even as an opponent, to have always felt such love and respect from the supporters in the stands."

Juve said the transfer fee agreed was 15 million euros ($NZ25.1m) plus eight million euros ($NZ13.3m) in performance-related add-ons, as Ronaldo returns to the club where he won eight major trophies from 2003-2009.

"My first domestic League, my first Cup, my first call to the Portuguese National team, my first Champions League, my first Golden Boot and my first Ballon d'Or, they were all born from this special connection between me and the Red Devils," added Ronaldo, who spent the last 12 years winning a glut of trophies at Real Madrid and Juventus.

Ronaldo back in a Man Utd shirt.
Ronaldo back in a Man Utd shirt. Photo credit: Getty

"History has been written in the past and history will be written once again! You have my word!

"I'm back where I belong. Let's make it happen once again... Sir Alex, this one is for you."

Ferguson signed Ronaldo when he was a teenager in 2003 and British media had reported last week that the Scot convinced Ronaldo to return to United.

Ronaldo has often spoken in glowing terms of his time at the club and has previously described Ferguson as his "father in football".

The club responded to the post, saying: "Welcome home, Cristiano."

Ronaldo is set to join up with the squad after the international break and could make his first start when they host Newcastle United on September 12, if he returns unscathed from his duties with Portugal.

During his first spell in Manchester he scored 118 goals and won the Premier League Golden Boot in the 2007-08 season, the year Ronaldo helped United claim their last Champions League title.

He then went on to capture two LaLiga and four Champions League titles with Real Madrid, as well as four further Ballon d'Or awards, ending his stint at the Spanish club as their all-time top scorer with 451 goals.

"You run out of words to describe Cristiano," United manager Ole Gunnar Solskjaer said. "He is not only a marvellous player, but also a great human being.

"To have the desire and the ability to play at the top level for such a long period requires a very special person."

Reuters.