Brendan Rodgers resigns as Celtic manager
Former boss Martin O'Neill returns on interim basis
Major shareholder Dermot Desmond accuses Rodgers of "divisive, misleading, and self-serving" behaviour
O'Neill says he is "keeping the seat warm" for Celtic's next manager
'I took a gasp of breath and thought is this real? - O'Neill on being offered the Celtic job for a second time
Scottish Premiership champions are eight points behind Hearts after losing 3-1 at Tynecastle on Sunday
Who should succeed Rodgers? Submit your thoughts here and vote in our poll at the top of this page
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Ange has to be the popular choice he can deliver domestic success but forget Europe. That's all the board are looking for anyway absolutely no ambition to progress as a football club. Balance sheets are more important than team sheets.
Tom
Image source, Getty ImagesFormer Celtic manager Ange Postecoglou is the man many are tipping to take the job.
The 60-year-old Australian won a league and cup double in 2021-22 - his first season in charge at Parkhead - and followed that up with a treble in his second season, adding the League Cup to another league title and Scottish Cup.
Postecoglou left Celtic in 2023 to take the Tottenham manager's job, where he won the Europa League last season.
His attacking style of play came under serious scrutiny during his time at Spurs, leading to Postecoglou's sacking in the summer, while his subsequent 39-day tenure at Nottingham Forest has further blotted his copybook.
But 'Big Ange' remains popular with Celtic supporters and former striker Chris Sutton said he would be a "smart appointment".
Right, let's get into these names being linked with the permanent manager's job at Celtic, starting with a reminder about the leading contender, according to the bookmakers...
Craig Nelson
BBC Sport reporter
Sunday's Old Firm derby in the League Cup semi-finals has been mentioned by Martin O'Neill.
It's a fearsome fixture for any new manager to contemplate, but surely one that O'Neill would relish?
It's important to note that, while Celtic's new interim manager has spoken with TalkSport, for whom he is a regular pundit, O'Neill has not yet held an official news conference since taking the post.
His first match in charge is a Scottish Premiership fixture against Falkirk on Wednesday.
It is also important to note that BBC Sport has contacted former Celtic boss Brendan Rodgers for comment - he is yet to respond.
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Martin O'Neill vs Danny Rohl could happen on Sunday. Absolutely NO ONE would have even considered that just a few weeks ago!
Adam in Inverness
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After the events of the past 16 hours or so, we could not have asked for a better interim manager than Martin O'Neill. He will have no problem getting the team motivated.
Philip
Image source, Getty ImagesBut first, a final word from Martin O'Neill, taken from his interview with TalkSport, about working with one of those names in the frame for the permanent job - Shaun Maloney: "Shaun and I go back years and years, when he was a young player with me. He is experienced in management now and he's worked with lots of really good coaches."
Craig Nelson
BBC Sport reporter
Former Celtic boss Ange Postecoglou is being heavily linked with a return as permanent manager, but the out-of-work Australian is not the only name in the frame.
Others to top of the bookmakers' odds include Martin O'Neill's interim assistant Shaun Maloney, former Celtic striker Robbie Keane, former Manchester United bosses Erik Ten Hag and Ole Gunnar Solskjaer, Wales manager Craig Bellamy and former Shelbourne head coach Damien Duff.
Stick with us and we will have a look at some of these names in more detail.
Celtic's new interim boss Martin O'Neill was giving nothing much away, in his interview with TalkSport, when asked about who should be appointed long term: "Interim does mean that to me. Absolutely. It's really as simple as that.
"Celtic are looking for, I would have assumed, a young coach coming in now who has a proven ability and would be wanting to pull the club forward now from their position as it stands.
"That's how I would view it and I suppose if I was a Celtic fan, I would absolutely see it."
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At the end of the day Ange might be our only option. Looking at some of the managers linked with the club, none are of Celtic quality. All cheap options that suit the board perfectly. Celtic should be pushing for a top-quality manager with European experience.
Chris
Image source, Getty ImagesMartin O'Neill speaking to TalkSport about facing Falkirk on Wednesday night, and then Rangers in the League Cup semi-finals on Sunday: "If I'd seen the fixture list, I possibly then wouldn't have taken it. That is supposed to be a joke, Jim!
"It is what it is and it's come as a bit of a shock. I think you can hear from my voice, as much as anything else."
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Alex Ferguson, when asked if Man U were in trouble when his team were mid table in November, said "listen son, if this was the 5th of May I would say yes, so don't ask daft questions". He won the league that season.
Alex
Image source, Getty ImagesMore from Martin O'Neill, speaking to TalkSport, about the opportunity to manage Celtic again: "I think I said that to you a long time ago. I can't emphasise this enough, this is short term, until a permanent manager is appointed.
"I think that Celtic will be searching around, as I said to you, for that young manager with proven ability who has got a bit of a track record. I will just sit in there and keep the seat warm for him."
Image source, Getty ImagesMartin O'Neill has told TalkSport about his shock at being offered the interim position by Celtic: "I took a gasp of breath and thought, is this real or surreal?
"It's difficult really to turn down somebody who gave you the job in the first place when he had really some great options a way back 25 years ago.
"So from that viewpoint, maybe by the time that I pulled myself off the floor, I probably thought then maybe I should do it.
"I think they were probably stunned by the news that Brendan left and as a consequence, they maybe might be obviously seeking a permanent manager."
Paul Lambert
Former Scotland midfielder on BBC Radio 5 Live
You could bring in Koko the clown [to be the new manager], he has to win games. You have to win games, that is what I would say. Bring in anybody you want, win games.
Craig Nelson
BBC Sport reporter
Interestingly, former Scotland midfielder Paul Lambert told BBC Radio 5 Live much the same thing when asked what the job description should be for the new Celtic manager.
"Winning games" was also his mantra...
Martin O'Neill repeatedly told TalkSport that his appointment as interim manager at Celtic was "short term", but sidestepped questions about exactly how long he expected his tenure to be.
O'Neill instead preferred to focus on his "short-term" mission of winning games.
More to follow.
Craig Nelson
BBC Sport reporter
Brendan Rodgers has not yet spoken since his resignation as Celtic manager on Monday night.
But we are just about to hear from his interim successor, Martin O'Neill, who has been speaking with Talksport.
On Monday, O'Neill was on the radio station talking up Hearts' chances of winning the Scottish title this season.
I wonder what his take will be on that today?
BBC Radio 5 Live
Former Scotland winger Pat Nevin has been speaking to BBC Radio 5 Live about the statement released by Dermot Desmond:
“I’ve seen it before, and I’ve heard boards feel like this before, but they don’t generally say it like that.
“It was an extraordinary statement. But if Brendan lasted this season I would have been absolutely staggered and amazed, unless it was an incredibly successful season.
“Boy, would you love to hear Brendan’s line on this!”
Dermot Desmond's 551-word statement that followed Brendan Rodgers' resignation blew this story wide open.
Here's a flavour of what Celtic's major shareholder had to say: