Leicester have paid a club record fee to sign Youri Tielemans from Monaco.
Tielemans has signed a four-year deal after the Foxes parted with 40m to bring him to the King Power on a permanent basis.
The 22-year-old excelled on loan with Leicester during the second half of last season and he can't wait to continue to improve with his teammates.
He said: "It is such a great feeling to sign for this Football Club. Ever since I arrived on loan last season, all the players, the staff and the fans have been fantastic with me, so I'm thrilled to be able to become a Leicester City player.
"I believe that we have the talent in our squad to achieve something special and for any player, that's an exciting thing to be a part of. I really can't wait to get started again with this Club and do everything I can to help my team-mates."
