Europe's top clubs were eager to sign the Anderlecht youngster, including Atletico Madrid, Manchester United and City.
However, the Ligue 1 winners have managed to lure the promising young talent.
'Thrilled to be part of this team next year', were his words following his move from the Belgian side.
Ravi de faire partie de cette équipe l'année prochaine! Thrilled to be a part of this team next year! @AS_Monaco pic.twitter.com/kqjV5O76aH
— Youri Tielemans (@ytielemans) 24 de mayo de 2017