Josh Cullen will have a medical tomorrow after Anderlecht agreed a deal to sign the West Ham midfielder.
Cullen, 24, will sign a three-year deal with the Belgian side who are managed by former Manchester City captain Vincent Kompany.
Ireland international Cullen has come through the ranks at West Ham and will be the third academy product to leave the London Stadium this summer after Jeremy Ngakia and Grady Diangana.
With less than a year left on his contract and David Moyes unable to guarantee Cullen the regular football he wants, the Hammers decided to accept Anderlecht's offer.