In the early hours of Tuesday morning, UFC star ​Conor ​McGregor declared his retirement from MMA ​via a Twitter post. The Irishman posted what he described as a "quick announcement" in order to break the news. 

​​McGregor's tweet had some interesting phrasing in it. The 30-year-old wrote "I've decided to retire from the sport formerly known as 'Mixed Martial Art' today." 

This isn't the first time McGregor has announced his retirement, stepping away from the scene briefly in 2016 before making a loud return to the sport. He's faced some trouble with the law over the past year, however, most recently for ​snatching and breaking a fan's phone in Miami.

The Notorious is calling it quits, folks. McGregor's last time in the ring was his loss to Khabib Nurmagomedov on October 6,​ which infamously ended with chaos and McGregor being slapped with a six-month suspension, which he is still serving. 

McGregor's next fight was expected to be with Donald "Cowboy" Corrone in the summer, but he reportedly scrapped the potential bout after refusing to co-headline the event, demanding the full spotlight instead.

McGregor will go down as one of the most iconic fighters of his generation, largely due to his wild personality both inside the Octagon and out. He had a controversial career, but no one can deny in the influence McGregor had on the sport of mixed martial arts. It's hard to imagine another quite like him.