They have signed him from Swansea
West Ham have signed Andre Ayew from Swansea.
They have paid £20.5-million (€24.12 million) for the Ghana forward.
He moves to the Olympic Stadium on a three-year deal, with an option of a further two years.
"They want to become a bigger club every year and with the new stadium and a new training ground, you can feel they are moving on to another level and I want to be part of this project," said Ayew.