Alan Pardew has signed a two and-a-half year contract with West Bromwich Albion.
The former Crystal Palace boss inherits a team which blew a 2-0 lead on Tuesday to draw 2-2 with Newcastle.
Albion are two points above the Premier League relegation zone and winless in their last 13 games in all competitions.
Pardew's first game will come against Palace - the club which sacked him last December - on Saturday.
The Baggies have drawn both their games since sacking Tony Pulis last week.
Pardew said: "I’m thrilled with the opportunity Albion have provided and looking forward to getting to work with what I consider to be a talented group of players.
"The immediate challenge will be to get the results we need to pull ourselves up the table. But I’m aware that while I’m joining one of the great, traditional clubs of English football, it is one determined to go forward in the Premier League.
"It’s an exciting opportunity to play a part in that ambition."