Martin O'Neill revealed there are two different versions of Roy Keane as the former Republic of Ireland manager recalled his time in the hotseat with the Boys in Green.
The former Republic of Ireland manager appeared on the Late Late Show to promote his new book On Days Like These.
Hlast job in football was as the manager of Nottingham Forest, where he was sacked back in June of 2019.
READ MORE: Robbie Keane and Jack Grealish among footballing figures to wish Shay Given's son a happy birthday
That sacking came shortly after his assistant Roy Keane had departed the club, and it was Keane who served as O'Neill's assistant for five years with the Republic of Ireland.
And when asked about Keane's persona by Ryan Tubridy, O'Neill joked that Keane was different without his beard.
"I think if he has the beard - which does not suit him - trouble is brewing, there is no question," he said. "Clean shaven, I can relax a bit."
And O'Neill even offered his advice to fans wanting a selfie with the sometimes reluctant Keane.
He explained: "If you're walking down the street with Roy, you know there's going to be fans coming up.
"He doesn't really like the selfies and he can be mad, particularly when he's got the beard.
"You want to warn people coming up: 'don't go there!'
"If you want to have a selfie with Roy, buy a dog."
O'Neill also revealed that when work as a professional footballer dried up he found a job with a company who provided pension solutions - and when he was given the uncomfortable position of manager, he figured football management would not be beyond him.
He said: "I'm up there in Nottingham and I'm doing it and they make me manager and I thought I might have a chance at football management.
"If I'm managing a group of people I know nothing about then I can manage a group of footballers!"
And O'Neill had mostly positive memories of his time in charge of the Republic of Ireland team - but hinted that he felt there was excessive criticism of him because he was a Northern Irishman in charge of the Republic.
He said: "Listen, wouldnt it be great to recaptutre some of those days.
"When we got to France the first game we played was against Sweden in Paris.
"The colours, Sweden yellow and us in green and to know there were those fans there felt as if we'd done something right.
"That was great."
Reaching the last 16 in the Euros was no doubt the high point, but a heavy World Cup playoff defeat at home to Denmark soured his tenure and the criticism mounted.
"Trying to get to the World Cup, we got to the playoffs," O'Neill said. "We drew against Denmark away and got mauled against them in Dublin.
"I have to be blamed, no doubt about it.
"My relationship with the press, I felt before as if there was a strangeness there. We didnt get on.
"Was it? [because O'Neill wasn't from the Republic] I felt that at the time.
"I felt that the criticism I got was extended a little bit. You accept criticism, I've had it all my life but I felt like there was a dam bursting."
READ NEXT:
Rhys McLenaghan names 'greatest female boxer of all time' Katie Taylor as his sporting hero
Robbie Keane and Jack Grealish among footballing figures to wish Shay Given's son a happy birthday
Simon Cotter rejects claims Ireland will take a casual approach as Fiji prepare for Aviva showdown
Stephen Bradley opens up on why Damien Duff had to leave Shamrock Rovers
Get the latest sports headlines straight to your inbox by signing up for free email alerts
