The former Swansea City player becomes a record signing for the London club after sealing the transfer move worth £20.5 million.
Andre Ayew played alongside Dimitri Payet, the West Ham United star-man at Olympique Marseille before they parted ways.
Fate has brought them together at West Ham and Jon Benjamin believes they will thrill football fans at West Ham United.
He posted on his Twitter handle: "Now, here's quite a lethal pairing reunited at #WHUFC to rip up the EPL this season. Be afraid, be very afraid!."
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