Chelsea have completed a £12m move for 19-year-old St Etienne defender Kurt Zouma.
The France Under-21 centre-back has agreed a five-and-a-half-year deal with the Blues, but will stay at St Etienne on loan for the rest of the season.
Zouma has made 12 league appearances for the French Ligue 1 side this season.
Born in Lyon, Zouma joined St Etienne as a 15-year-old in 2009 before turning professional two years later.
He has made 52 appearances for the club, scoring four goals.
St Etienne president Roland Romeyer had previously said the player would not move in the transfer window.
Source: BBC Sport.