The Belgian teen, 15, is joining United from PSV Eindhoven, choosing the Red Devils ahead of offers from Arsenal, Chelsea, Liverpool and Newcastle United. Tottenham, AC Milan, Villarreal and Anderlecht had also made contact with Pereira's management, but without making any offer.
"PSV knew I was talking with other clubs and respects my choice," said Pereira. "PSV gave me my chance, but Manchester United is obviously a great club. Every young footballer would be proud to get such an offer."