The Senegal international has signed a three-year-deal with the Magpies, after the club reportedly met the £4.5million buy-out clause installed in his Tigers contract, reports the Belfast Telegraph.
Diame scored the winner in the play-off final in May, and was offered a new deal by Hull City to try and deter the interest from Newcastle. But the 29-year-old will now stay in the Championship and join Rafa Benitez at St James’ Park.
It’s been a difficult pre-season for Hull, who are currently without a manager after Steve Bruce resigned from the role. Reports suggest the reason he left was a breakdown in the relationship between Bruce and the club’s owners.
But the Tigers are yet to announce a replacement, with less than two weeks until their opening fixture of the new season, against defending Premier League champions Leicester City.
And with Diame leaving too, it could further fuel the expected fans protests at the clubs owners ahead of that Foxes fixture.