James Ward-Prowse has completed his £30m move from Southampton to West Ham.
The midfielder brings to an end a 20-year spell at Southampton, having joined the club from the age of eight.
He joins the Hammers on a four-year contract until June 2027.
“I’m buzzing to be here at West Ham United. It’s great to be here and I’m looking forward to getting going,” said Ward-Prowse, who is West Ham’s second summer signing following Mexico midfielder Edson Alvarez.
Ward-Prowse made 410 appearances for Southampton’s first-team and scored 11 goals in all competitions in each of he last two seasons for the Saints – but could not keep them in the Premier League last term.