Chelsea have confirmed the signing of Genk winger Kevin De Bruyne on a five-and-a-half year deal.
The 20-year-old has been heavily linked with a move to Stamford Bridge, after having played twice against The Blues in the Champions League this season.
As part of the deal, De Bruyne will be loaned back to the to the Belgian champions for the remainder of the season, joining up with Andre Villas-Boas' side in the summer.
"It's a little bit of a dream come true," he said. "I've worked very hard and am still very young but have already played a lot of games. To come to a team like Chelsea is a dream but now it's a reality and I have to work hard to achieve the level that's necessary.
"I signed now and now I will go back for six months on loan to play some games and gain more experience. Next season it would be normal to be loaned out, but I will start the preparations here at Cobham, and if it goes really well maybe I will stay but probably it will be a team a little level less than Chelsea but bigger than Genk.
"Chelsea is one of the biggest clubs in the world and if you see the level they have compared to Genk then it is a real difference but it's something I want to achieve and I will work very hard to get there."
The deal will keep De Bruyne at the club until 2017, for a fee rumoured to be around £7 million.
The starlet reportedly underwent a medical on Monday ahead of his move from the Belgian Pro League champions, a title they won for a third time in their history last term.
The addition is the second Chelsea have made in the January transfer window, following the signing of Gary Cahill from Bolton Wanderers.
Cahill is yet to make his debut for the west Londoners, however, in the absence of John Terry is expected to take his place in Villas-Boas' side to face Swansea City at the Liberty Stadium on Tuesday.