Paris (AFP) - Ghana midfielder Andre Ayew has joined West Ham United on a club record three-years deal from their Premier League rivals Swansea, the London outfit said on Monday.

The former Marseille winger and son of one-time African player of the year Adebi Pele, joined the Hammers for a fee of £20.5million (S$40.4 million).

"I am very proud and happy to be at this magnificent Club," the 26-year-old told West Ham's 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," he said.

Ayew scored 60 times in over 200 appearances at French outfit Marseille before joining Swansea last season.

Playing a key role in their 2014 World Cup campaign, Ayew has extensive international experience with Ghana.