Leicester City midfielder N'Golo Kanté joined Premier League rivals Chelsea on a five-year deal on Saturday after turning down a new contract offer from the Foxes.
The 25-year-old departs Leicester for a club-record fee, having played a crucial role in the club's memorable title-winning run last season.
"I am so happy to have signed for one of the biggest clubs in Europe. It's a dream come true for me," Kanté told Chelsea's official website.
"The opportunity to work with Antonio Conte, a brilliant coach, and some of the best players in the world was simply too good to turn down.
"My first season in English football was very special and now I hope to go on to achieve even more during my time as a Chelsea player.
"I am looking forward to meeting up with my new team-mates and helping the club achieve a lot of success."
Kanté made 40 appearances in all competitions for the Foxes last term, bagging one goal and providing four assists.
Leicester, meanwhile, have wished the France international well after he joined the London outfit.
In a statement published on their website, the Foxes said: "Despite the offer of a substantially improved, long-term contract, made before this summer's European Championships, it became apparent after the tournament that N'Golo's wish was to join Chelsea.
"The Club subsequently accepted a Leicester City-record fee on Friday before N'Golo finalised personal terms and completed a medical.
"Leicester City would like to place on record its sincere thanks to N'Golo for his contribution to the most successful season in the Club's history.
"He departs with the best wishes of everyone at Leicester City."