Ayyoub Bouaddi has completed his move from Lille to Manchester City.
The 18-year-old arrives at the Etihad Stadium for a fee of €100 million (£85.6m / $117m). City will pay an initial €95m with another €5m due in potential bonuses. He has signed a five-year deal until 2031.
The Morocco international becomes the most expensive Premier League teenager, eclipsing Leny Yoro's €70m move from Lille to Manchester United in 2024.
He's City's second major midfield signing of the summer after Elliot Anderson's arrival from Nottingham Forest.
Ayyoub Bouaddi impressed for Morocco at the World Cup. MB Media/Getty Images "Manchester City are, for me, the best club in the world," Bouaddi said.
"It's a dream to be here and be able to call myself a City player. I have spent most of my life working hard to become the best player I can be and reach the top of the game.
"I've watched City for many years, and I love their style of play. City always try to play quality football. And they have shown they are winners. This club feels like it's built to win."