Crystal Palace have completed the signing of Chelsea defender Marc Guehi on a five-year deal.
The England Under-21 international, who underwent his medical on Thursday, becomes new boss Patrick Vieira's third signing at Selhurst Park.
The 21-year-old has had two loan spells at Swansea after coming through Chelsea's youth system.
"It's a great opportunity for me to come to such a big club in the Premier League," said Guehi.
"I'm really excited to get going. [The club is taking] a really exciting direction with the new gaffer that's come in.
"A lot of good young players are here and obviously such a stable club with top players really enticed me and made me want to come.