Chelsea have announced the signing of Jorginho from Napoli.
The Italy midfielder has agreed a five-year deal as the club's first signing of the summer. He will wear the No 5 shirt at Stamford Bridge.
"I am absolutely ecstatic to be here at Chelsea," Jorginho, 26, told Chelsea's official website. "It is not easy to become part of such a big team so I am very, very happy.
"I am excited to play in such an intense league, for a team that gives everything to play and win."
The deep-lying midfielder made 37 appearances for Napoli in all competitions last season.
He scored three goals in 2017/18, including a penalty against Manchester City in the UEFA Champions League. He also got four assists in all competitions.
The Brazilian-born player had the most touches of the ball per minute last season in Europe's big five leagues.
Chelsea open their 2018/19 Premier League campaign at Huddersfield Town on Saturday, 11 August.