Southampton have signed Croatia winger Mislav Orsic from Dinamo Zagreb on a two-and-a-half-year contract.
He also helped Croatia to a third-place finish in the 2022 World Cup, scoring the winning goal against Morocco.
Southampton manager Nathan Jones said: "Mislav is a significant addition to our squad and I'm delighted we have been able to get him in so quickly."
Jones added: "He's a serious attacking threat and I'm sure anyone who has followed his progress or saw what he achieved at the World Cup will realise the talent he has. We're excited to have him here.