Conor McGregor got one of the biggest cheers of the day when he made an unexpected appearance at the Pendulum Summit in Dublin.
The crowds roared with laughter when McGregor and Richard Branson both removed their tops and did a mock 'squaring up' to each to each other.
Mr Branson was the much-anticipated guest at the event in the Convention Centre yesterday evening - but McGregor's sudden appearance nearly brought the house down. He came on stage to present Mr Branson with a gift, and said a few words. The UFC star said that key to his sporting success was working hard and remaining true to himself.
The grin stretched from ear to ear on Mr Branson's face.
Prior to that, it had been an interesting chat from the world famous businessman.
"When you are in business you have two critical things, your brand and your reputation, and you have to do your best to promote it and then to protect it," was his message.
In November last year, Forbes estimated Mr Branson's net wealth to be $5.1bn (€4.2bn).
Meanwhile, it was a tour-de-force for all the speakers who graced the stage at the first day of the summit.
There wasn't an empty seat to be had in the Convention Centre, in Dublin, for the event billed as the "world's leading business and self-empowerment summit".
Entrepreneur Michelle Mone held the audience spellbound throughout an engaging and heartfelt talk that traced her roots growing up in Glasgow, to leaving school at 15, and eventually setting up her own Ultimo lingerie company, which made her a millionaire.
She sold the business a few years ago, but is now planning the launch of new brand which may be called Michelle Mone Intimates, she revealed to the Irish Independent.
She is now touring the world and involved in nine new businesses.
"So guys, how did I get here today from the east end of Glasgow having absolutely nothing?" she asked,
In her speech, she said: "You need balls of steel. We all have our knocks, and those knocks throw us on the floor and make us feel so hurt inside that if we don't dust ourselves down and get up, we will never be able to fly higher and keep growing as human beings. I never ever take no for an answer," she said.
Hypnotist Keith Barry had the audience on the edge of their seats with his compelling stage performance.
It turns out that big things are on the cards for the star this year.
He will be appearing on prime time television state-side after shooting a new series for Fox, he revealed to the Irish Independent.
Happier employees are 12pc more productive and take 10 times fewer sick days, Marci Shimoff bestselling author, world-renowned transformational teacher and expert on happiness, success, and unconditional love, told the Pendulum Summit.