Neil Warnock has become the first Premier League manager to lose his job this season after being sacked by Crystal Palace.
Palace suffered a 3-1 home defeat to Southampton on Boxing Day, a result that saw them drop into 18th place in the table.
Keith Millen will take charge of the team ahead of Sunday's clash with Queens Park Rangers.
A club statement read: "Crystal Palace Football Club can today confirm that Neil Warnock has been relieved of his duties and is no longer first-team manager.
"The club would like to put on record its thanks to Neil for all his hard work and energy over the past four months."
Warnock took charge of the club for a second time in August after Tony Pulis left his role just two days before the start of the new season.
Palace won just three of their 16 Premier League games this season under Warnock.