David Moyes is backing Danny Ings to fire West Ham to Premier League safety after signing the England-capped striker from Aston Villa.
The 30-year-old moves to the London Stadium for a reported initial £12million, rising to £15million if the Hammers avoid relegation.
Former Liverpool, Burnley and Southampton player Ings has signed a two-and-a-half-year contract, with manager Moyes optimistic he can bring goals.
Moyes, who is under pressure with his side in the relegation zone, saidl: "I'm really pleased to add Danny to the squad. He is a proven Premier League goalscorer and will add great competition for places in the attacking third.
"We're looking forward to integrating him into the group, as we go into a busy period in our season."
West Ham have scored just 15 goals in 19 Premier League games so far, winning only four times.
In 18 league appearances for Villa this season, just eight of which were as a starter, Ings managed six goals.
Ings, who has three England caps, told the Hammers' official website: "It's important I settle in as quickly as I can do – and do the important stuff on the pitch for West Ham."
West Ham face a massive showdown at home to Moyes' former club Everton, who are a place below them in the table, on Saturday.