Eden Hazard has signed a new five-and-a-half year deal with Chelsea, the club have confirmed.
The 24-year-old Belgian international has been in talks with the Blues over a new deal for most of the season but has committed to a new deal that will keep him at the club until 2020.
"Since I came here in 2012, I have always felt good and the club has been very supportive to me," Hazard told the club's official website.
"The manager has helped me improve a lot, the fans have been fantastic and I have an amazing understanding with my teammates.
"I always try to give pleasure to the supporters with my style of play and it is nice to know they appreciate my work.
"I hope we can repay that support by winning lots of trophies, beginning with the Capital One Cup at Wembley, and after that, we can push hard towards the end of the season."
The former Lille star has grown into one of the best players in the Premier League under Chelsea manager Jose Mourinho and the Blues coach is confident the midfielder can go a step further in the coming years.
Mourinho said: "I am very happy that Eden has signed a new contract. It shows he believes in the club's coaching staff and players to help him become the best player in the world.
"He is already a top player and his evolution has been fantastic. He is still very young and he can become the best."
Hazard, Chelsea's reigning player of the year, has scored 43 goals and contributed 46 goals in 147 appearances following his £32m move in 2012.
Chelsea's announcement comes days before their Champions League last 16 meeting with Paris Saint Germain, who have previously attempted to prise the Belgian away from Stamford Bridge.