Newcastle have signed Bazoumana Toure from Bundesliga club Hoffenheim for £42m.
The 20-year-old winger is the second signing of the summer for Eddie Howe after keeper Ewen Jaouen, also 20, joined last month.
Toure represented Ivory Coast at the World Cup, starting their first game against Ecuador and making two more appearances off the bench.
Toure is the first outfield signing in what is expected to be a busy summer for Newcastle following the £170m double sale of Anthony Gordon and Sandro Tonali.
Bazoumana said: "I'm very, very happy to be here. It was my dream since I was young to play in the Premier League for a big team like Newcastle.
"Newcastle is like a family, which will help me show my best on the pitch. I will give my best every single day for this shirt.
"I'm very excited to join Newcastle and I can't wait to meet my team-mates, the supporters and everybody at the club. I'm also very excited to play at St. James' Park for the first time."
Howe said: "We're really pleased to have been able to bring Bazoumana to Newcastle United.
"He has shown his ability to perform in a top European league during his time in Germany and has gained really good experience with his national team, especially at this summer's World Cup.
"We feel that he's a player with a really high ceiling - he's somebody who we believe can offer us something different. He also a lot of potential to unlock and we're really looking forward to working with him."
