CR7 has managed to find the net in each of his three appearances in all competitions since he re-signed for the Red Devils from Juventus.
His first Premier League game saw him fire in a double against Newcastle.
The 36-year-old hit the back of the net again in the Red Devils' Champions League opener against Young Boys, which ended in a shock defeat.
And Ronaldo kept up his stunning scoring run as United held on to beat West Ham at the London Stadium on Sunday.
The deadly forward scored an equaliser in the first half to give him his third Premier League goal of the season, and fourth since re-joining United.
The Red Devils went on to win the game 2-1, but Ronaldo could certainly have had many more to his name in that game.
But three goals in the space of two Premier League games is already a fantastic return, as United sit second in the table and only behind leaders Liverpool on goal difference.
In fact, Ronaldo has scored in every game he's played since returning to Old Trafford - well and truly ending the club's infamous 'No.7 curse'.
United famously failed to replace Ronaldo following his initial exit to Real Madrid back in 2009, with a series of star players struggling to live up to CR7's legacy.
Michael Owen, Antonio Valencia, Angel Di Maria, Memphis Depay and Alexis Sanchez were all hit with the 'curse', with Edinson Cavani appearing to lift it for his one season with the famous number before handing it back to its rightful owner.
But Di Maria and Sanchez were the biggest disappointments following their highly-anticipated moves to United, which both fell flat.
And Ronaldo's goal flurry has seen the 36-year-old score as many Premier League goals in his second spell at United already as Alexis Sanchez and Angel Di Maria managed during their entire time at the club.
Sanchez took 32 games to reach that tally, while Di Maria took 27, with both later leaving with just three Premier League strikes to their name.
Ronaldo has showed why he is such a fan favourite at Old Trafford and the next milestone in his sights will be joining the Premier League 100 club.
Adding those three to his 84 from his first spell means he is just 13 away.
The end of Manchester United's No.7 'curse'
Michael Owen: 31 appearances, 5 goals
Antonio Valencia: 30 appearances, 1 goal
Angel Di Maria: 27 appearances, 3 goals
Memphis Depay: 33 appearances, 2 goals
Alexis Sanchez: 32 appearances, 3 goals
Edinson Cavani: 39 appearances, 17 goals
Cristiano Ronaldo (second spell): 2 appearances, 3 goals
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