Newcastle have signed teenage defender Kevin Mbabu from Swiss side Servette.
The 17-year-old, who is predominantly a central defender, has put pen to paper on a three-and-a-half-year deal after a successful trial and will go into the club's development squad.
The Switzerland Under-19 international told the club's official website, www.nufc.co.uk: "I am delighted to join Newcastle United. Today is a big day for me. I've always wanted to sign for a club in the Premier League and Newcastle is one of the biggest there is."
He went on: "I want to finish my development here with the reserves before one day training with the first team and hopefully breaking into the first team."