Crystal Palace have signed Blackburn Rovers midfielder Adam Wharton.
Wharton joins for a fee of 18m, potentially rising to 22m.
The 19-year-old midfielder has signed a five-and-a-half-year deal with Palace.
"I've always wanted to play in the Premier League and to play for such a big club like Crystal Palace is a great honour," said Wharton, who made 51 appearances for Blackburn.
"The way they've brought players from the Championship and developed them into world-class players in the Premier League is something that stood out to me, and it's a big reason why I wanted to come here."
He added: "I've been there [Blackburn] all my life, since I was six, so it was a difficult decision, but I'm delighted to be here and I can't wait to start."
Palace chairman Steve Parish said: "Adam's consistently impressive performances for Blackburn at such a young age have understandably caught the eye of many a club, but we believe Palace to be - as has so often been the case in recent years - the perfect place to harness his undoubted potential, and we look forward to working with him in the years ahead to do so."