West Ham have stepped up their recruitment on transfer deadline day, with Nikica Jelavic the latest arrival on a two-year deal from Hull City.
The 30-year-old Croatian striker joins the Hammers for an undisclosed fee, and has the option of adding a further two years to the contract.
The former Everton attacker will be reunited with countryman Slaven Bilic at Upton Park, and is the club's third deadline-day signing after Victor Moses and Alex Song joined on loan from Chelsea and Barcelona respectively.
"I am very excited to be signing for West Ham United, especially as it is a big Club and I didn't know until a couple of days ago that I would have the opportunity to come here," he told his new club's official website.
"Of course it is always a target to play in the Premier League, so when I found out that West Ham wanted me there was no doubt that I wanted to come here.
"I've played for Slaven before for the Croatia national team and he is a great manager and a great man. I am really happy and delighted to be working with him and all his staff again."