Steve McClaren has resigned as Nottingham Forest manager after just three-and-a-half months in charge.
The former England manager quit shortly after Forest were beaten 3-1 by Birmingham at the City Ground.
That defeat, coupled with a 5-1 hammering at Burnley on Tuesday, prompted post-match talks with Forest chairman Nigel Doughty and it was later confirmed McClaren had quit.
"Nottingham Forest can confirm that Steve McClaren has resigned from his role as manager," a club statement read.
"He has left the club without compensation - nor will he be seeking any. The club can confirm that the search for a new manager will begin immediately.
"Mr Doughty has also announced his intention to step down as chairman of the club at the end of the season after 10 years in the role.
"The search for a new chairman will commence immediately."
In the aftermath of Tuesday's defeat, David Pleat left his part-time consultancy role with the club, leading many to believe McClaren would be at the helm for the foreseeable future.
That has not proved the case, though, with Forest now once again searching for a new boss.
Following spells in charge of FC Twente - where he won the Eredivisie title - and Wolfsburg, McClaren returned to English football to take the reins at Forest following Billy Davies' sacking in the summer.
The former England manager failed to galvanise the Midlands club, though, with them languishing 21st in the npower Championship after 10 games having reached the play-off semi-finals in each of the last two years.