Manuel Lanzini who is on loan from Al Jazira has signed a permanent deal with West Ham.
The club announced a deal worth £9.4 million had been agreed with his parent club, to sign the attacking midfielder permanently.
And Lanzini has signed a four year contract, with an option to extend it by two years.
“I am absolutely delighted to have signed and to be able to stay at this club,” he told the Premier League side’s official website.
“I really feel at home here, and when you feel at home somewhere, you definitely don’t want to leave.
“I am very happy and now what I want to do is to keep giving the best of myself.
“We’ve already done very well, and it’s already been a very good season, and when you’re so close to achieving your objectives, of course you want to keep dreaming.
“I always had big dreams as a child, but you never know what the future is going to hold. Thanks to God, I’m here, I’m enjoying the city, I’m enjoying the people and I really see my future here.”