Cape Town - West Ham United have announced the signing of Ghana international Andre Ayew on a four-year contract from Premier League rivals Swansea.
The 26-year-old joins the Hammers for a club-record fee of £20.5million, signalling manager Slaven Bilic's fifth acquisition of the off-season.
Ayew joined the Swans on a free transfer ahead of the 2015/16 season and went on to make 35 appearances in all competitions, scoring 12 goals.
"I am very proud and happy to be at this magnificent club. I am happy to be playing for these fans and I hope to make the people very happy here," Ayew told the club's official website.
"The Club have a lot of ambition and have a great manager. 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 onto another level and I want to be part of this project.
"I want to train hard, do my job and show that I deserve to play for West Ham United. I want to give back to the manager and the fans the confidence they are showing me."
Earlier in the day, West Ham secured the services of French left-back Arthur Masuaku on a four-year contract from Greek side Olympiacos.