London - Chelsea confirmed the signing of highly-rated Brazilian teenager Nathan from Atletico Paranaense on Thursday.
The newly crowned Premier League champions have moved quickly to bolster their squad for next season and the 19-year-old attacking midfielder will officially move to Stamford Bridge on July 1.
Nathan, who flew to England for his medical last month, is reported to have cost Jose Mourinho's side £4.5 million and he will join young fellow Brazilians Ramires, Willian, Oscar and Filipe Luis at the west London club.
The Blues also have young Brazilians Wallace and Lucas Piazon currently out on loan.
"I am very happy to be joining Chelsea, the champions of England, and I hope I will be able to learn a lot and develop my game," Nathan told Chelsea's website.
The teenager, whose full name is Nathan Allan de Souza, impressed Chelsea scouts while representing Brazil at under-17 and under-20 level and scored five goals in five games at the Under-17 World Cup in 2013.
In a message posted on his Instagram page, Nathan added: "A dream is coming true! Thank you Chelsea for trusting in me, I will do my best to support my team on reaching new achievements."