West Ham have signed Lazio striker Valentin ‘Taty’ Castellanos for an undisclosed fee on a four-and-a-half-year contract, with the option for a further year.

The 27-year-old joined Lazio in 2023 and made 98 appearances, scoring 22 goals and providing 16 assists.

Castellanos, who has won two caps for Argentina since making his debut in 2024, has also played for New York City FC and Girona.

West Ham said head coach Nuno Espirito Santo identified Castellanos as “a key target”.

Castellanos said he will “give everything” to the club.