Chelsea have acquired the services of England U-19 midfielder, Carney Chibueze Chukwuemeka from Aston Villa.
The 18-year-old has been at Villa since age 12 but refused extending his contract with the club this summer.
Chelsea have already signed Kalidou Koulibaly from Napoli and Raheem Sterling this summer, and are also rumored to be nearing the signing of Marc Cucurella from Brighton.
Born to Nigerian players in Austria, Carney moved to Chelsea for a fee in the region of £20m.
“It’s been quite hectic but I couldn’t get Chelsea out of my head the last few days so I’m just happy and relieved that it’s all done,” said Chukwuemeka.
“I’m so excited and just can’t wait to get on the pitch, meet all the players and try to win games and trophies with Chelsea.”
Chelsea chairman Todd Boehly added: “Carney is one of the most exciting young players in Europe so we are really looking forward to seeing him in action at Stamford Bridge. We are delighted to be able to bring him to Chelsea and add such a talented young individual to our squad for the new season and beyond.”