The Belgian striker joins on a five-year deal
Michy Batshuayi has completed his move to Chelsea after signing a five-year deal with Antonio Conte's side.
The Belgian forward, who scored once during their European Championships campaign, had been given permission to agree a deal before their quarter-final clash with Wales on Friday night.
Thank youuuu ❤ it feels good to be here (my english is bad .. sorry 😂😂) https://t.co/Jmk8eSWcE2— Michy Batshuayi (@mbatshuayi) July 3, 2016
"I am delighted to sign for one of the biggest clubs in Europe and embark on the next chapter in my career," he told the club's official website, "I hope I can help Chelsea win many trophies during my time at Stamford Bridge.
"Eden Hazard and Thibaut Courtois have told me many good things about the club, and with Antonio Conte coming in it's an exciting time to become a Chelsea player.
"This is a fantastic opportunity for myself and my family, I am looking forward to playing in the Premier League next season."
Batshuayi scored 23 goals last season for Marseille as well as notching 10 assists for the Ligue 1 side.