For Your Music Promotions On All Sites & Advert Placement, Kindly Call/WhatsApp:- 08102587168, 08136359909
The 22-year-old starred in Monaco’s run to the Champions League semi finals and Ligue 1 title win last season.
Chelsea confirmed the France international, who costs £40million, will wear the No 14 shirt this season at Stamford Bridge.
Bakayoko told the club website: ‘I am very happy to be here and to join this great team. I have grown up watching Chelsea. Signing was the natural thing for me because it is a club I loved very much in my childhood.
‘I am now looking forward to evolving under this fantastic coach and alongside so many great team-mates.’
Bakayoko rose to prominence last season as Monaco pipped PSG to the French league title, and reached the last four of the Champions League, beating Manchester City and Borussia Dortmund en route.
The fee is believed to be £40million for a player who will partner international team mate N’Golo Kante in the engine room of the Premier League champions.
While Kante will provide the destructive and energetic side to midfield play, Chelsea will look to Bakayoko for more expansive passing, as well being a physical presence.