HE has captured the hearts of the Irish nation but Conor McGregor has also gathered quite an impressive collection of celebrity fans on the road to his MMA success.
The Dubliner wowed crowds at the MGM Grand in Las Vegas on Saturday night and it seems more than a few well-known faces were watching.
Singer Sinead O'Connor sang McGregor into The Octagon adding to the incredible atmosphere.
Following his unforgettable victory over Chad Mendes a host of stars took to social media to congratulate him.
Arnold Schwarzenegger, who has dubbed the MMA superstar the McGregornator, led the tributes after the fighter's stunning win.
"Congrats to the McGregornator. You did it again," he wrote online.
Boxer Mike Tyson also reacted to the Dubliner's epic win and described him as a "beast".
Comedian Ricky Gervais weighed in on the result - with a somewhat more outlandish tweet.
"All f***ing hail the Notorious," he said on his social media account.
X-Factor singer Olly Murs paid tribute to the fighter's famous left hook.
"Just woke up after staying up and watching [McGregor] take down Chad Mendes! Nobody gets up after a left hand from him.. Deadly," he wrote.
Meanwhile, closer to home, the fight had the Irish rugby team on edge.
Tommy Bowe shared a video of some of the team watching it in the early hours of Sunday morning.
Conor Murray, Tommy O'Donnell, Johnny Sexton and Andrew Trimble were joined by Kieran Marmion and team manager Mick Kearney to cheer on the fighter as they settle in to their rugby world cup training.
Before the fight U2 led the charge of celeb well-wishers supporting the Crumlin-born star.
An image of the band with their fists in the air in front of a photo of him was posted alongside the proverb 'Go n-eiri an bothar leat'.
Irish band Kodaline and Gary Lightbody from Snow Patrol also joined in to praise the fighter.