The Premier League club confirmed on Tuesday that they have reached an agreement with Shakhtar Donetsk for midfielder in a deal believed to be worth around €55 million, which could rise to €60m with add-ons.
The Brazil global arrived at Manchester United's training ground this morning to complete his £52million move to the club.
United is in need of midfield reinforcements with Michael Carrick retiring and Marouane Fellaini out of contract.
Do you think Fred will be valuable for United?
Fred can work box to box, he has a lovely left foot, he's improving very nicely and has picked up valuable European experience.
There are good reasons why Fred, who could make his World Cup debut against Switzerland, has gone under the radar, as Brazilian journalist Alex Sabino points out.
"Official club announcement in due course".
'When I signed him at Shakhtar, Taison and Bernard were playing in his position. 'Of course every time you go to a new country it is hard at the beginning to adapt but I believe this will not be a problem for him.
What time is the World Cup on and where can I watch it in Hong Kong?
Fred is set to become the seventh Brazilian worldwide to ever play for Manchester United.
Even Ukraine's most capped player and former Bayern Munich player, Anatoliy Tymoshchuk, spent nine seasons with Shakhtar.