Slaven Bilic has been sacked by West Ham after leading his side to only two wins in 11 Premier League matches.
The Hammers' only victories of the campaign have come at home to newly promoted Huddersfield Town and struggling Swansea City, the latter courtesy of a 90th-minute winner.
Bilic's time appeared to be running short when Brighton and Hove Albion stormed to a 3-0 win at the London Stadium on October 20, before his players threw away a 2-0 lead to draw 2-2 at bottom club Crystal Palace.
And the former defender's fate was sealed by a sound 4-1 beating at the hands of Liverpool on Saturday, ending a reign that started in June 2015 and yielded seventh and eighth-place finishes in the top flight.
Former Everton and Sunderland manager David Moyes is widely reported to be in line to replace Bilic, who leaves with West Ham 18th in the Premier League.
A statement on West Ham's website read: "West Ham United can confirm that Slaven Bilic has today left his position with the club.
"The chairmen and board of West Ham United would like to place on record their thanks and gratitude to Slaven and his team for their services over the past two-and-a-half years, but believe a change is now necessary in order for the Club to move forward positively and in line with their ambition.
"West Ham United can confirm that Bilic's coaching assistants Nikola Jurcevic, Edin Terzic, Julian Dicks and Miljenko Rak have also left the club with immediate effect.
"The club's search for a new manager to take West Ham United forward is underway and an announcement regarding Bilic's successor is expected to be made over the coming days."