West Ham have announced Havard Nordtveit will join the club from Borussia Monchengladbach.
The Norwegian defensive midfielder will move to Upton Park on a free transfer on July 1 after he opted not to renew his contract with the Bundesliga side.
Nordtveit, who spent three years on Arsenal’s books as a youngster, has signed a five-year deal with Slaven Bilic’s side.
He told the Hammers’ official website: “It has always been a dream for me to play in the Premier League and now I have a big opportunity to do that for West Ham – I cannot wait to start!
“This team has something special, a spirit in the team that I can fit into. I will work hard and hopefully I can get some good moments at this Club.
“I’m a player who can play many roles on the pitch, but I’m from Norway so maybe a little bit more running, tackles and try to spread a few balls around me.
“I’m looking forward to showing what I can do, but hopefully I have something to help West Ham achieve even more.”
Nordtveit, who has been capped 28 times for Norway, becomes the Hammers’ second signing to join in July following the deal for Valencia striker Toni Martinez.
Spanish youth international Martinez, 18, agreed to make the move to West Ham back in April.