Chelsea have completed the signing of Marco van Ginkel from Vitesse Arnhem on a five-year contract.
Van Ginkel, 20, arrives at Stamford Bridge already a full international for the Netherlands having made his debut in November 2012.
He also represented his country in the Under-21 European Championships in Israel this summer where they lost in the semi-final to Italy.
The midfielder has made 93 appearances for Vitesse, who finished fourth in the Eredivisie last season.
He told the club’s official website: "I'm very happy to be here at such a nice club with great players. I am really happy, the stadium is good and the training ground is fantastic.
"I know about all the players and will meet them on Monday. I expect a lot, I've watched matches and it's really nice to be here."
Van Ginkel becomes Chelsea’s second signing of the summer after Andre Schurrle arrived from Bayer Leverkusen.