The source reports that the Portuguese coach—who left Chelsea in December after a miserable few months at Stamford Bridge—has put pen to paper on a contract that makes him the new head coach of United.
Sky Sports note that the high-profile manager travelled to a central London hotel on Thursday mid-afternoon to conclude talks on replacing Louis van Gaal at Old Trafford.
Despite winning the FA Cup on Saturday, the Dutch manager was fired at the beginning of the week following a disappointing spell at the north-west giants.
Sky Sports News HQ reported in the early evening, Mourinho returned to his Belgravia home after meeting with the club’s executive vice chairman Ed Woodward, having completed the deal.
However, while Sky Sports have confirmed the deal, the club’s official channels remain unusually quiet and are yet to confirm the move.
There is no mention of Mourinho on the club’s Twitter, as of 21:00 GMT on Friday evening, while there was similarly no mention of the head coach’s contract signing on United’s official website.