Hoedt agreed a five-year deal with the Premier League club and will arrive at St Mary’s as a potential replacement for his compatriot Virgil van Dijk.
Van Dijk is a target for Liverpool and Chelsea, but Saints insists he will not be sold, even though the central defender has still not joined first-team training under new manager Mauricio Pellegrino.
Hoedt began his career at AZ Alkmaar in his home country before moving to Lazio in 2015.
The 23-year-old, who made his senior international debut earlier this year, can’t wait to get started in the Premier League.
“I’m really happy to be here. I think Southampton is a really big club, so it’s a good next step for me to come here and to play in the Premier League and try to help the best I can,” Hoedt told Saints’ website.
Hoedt is Southampton’s third signing since last season after the arrivals of midfielder Mario Lemina and defender Jan Bednarek.
Download our app and read this and other great stories on the move. Available for Android and iOS.
