Kurt Zouma has completed a move from Chelsea to West Ham in a deal worth just under £30m.
Zouma, 26, has signed a four-year contract at the London Stadium and leaves after seven and a half years as a Blues player.
The French centre-back won two Premier League titles, a Champions League and the League Cup during his time at Stamford Bridge.
But those years included a struggle to hold down a regular first-team place at Chelsea – he had loan spells at Saint-Etienne, Stoke City and Everton.
“I’m very happy and very proud,” said Zouma after finalising his transfer.
“With the great season that West Ham had last year, that gave the team a lot of confidence to improve this year – and I want to help the team do that.”