West Ham have announced the "club record signing" of Brazil midfielder Lucas Paqueta on a five year contract.
The 25-year-old, who is expected to be part of the Brazil squad at this year's World Cup, has joined from Lyon.
The initial £36.5m deal for Paqueta could rise to more than £50m with potential add-ons - eclipsing the £45m signing of striker Sebastien Haller from Eintracht Frankfurt in 2019.
Paqueta joined Lyon for €20m (£17m) in 2020 after 18 months at AC Milan.
Paqueta scored nine goals and contributed six assists in 35 Ligue 1 appearances last season.
He has scored seven times in 33 games for Brazil and played for Lyon against West Ham in last season's Europa League quarter-final, which the Hammers won 4-1 on aggregate.
Paqueta has scored 21 times and contributed 14 assists in his 80 appearances for Lyon.
Moyes has spoken about the difficulties he has encountered signing players this summer as he bids to maintain momentum after last season's run to the Europa League semi-final.
The Hammers have three points from their first four Premier League games and host Tottenham on Wednesday
They will also compete in the group stage of the Europa Conference League.
