Former UFC featherweight and lightweight champion Conor McGregor has retired from MMA.

The 30-year-old Irishman posted a Tweet announcing his retirement early on Tuesday morning.

The Dubliner has not fought since October, when he was submitted by UFC lightweight champion Khabib Nurmagomedov.

McGregor, who had 21 wins in his 25-fight career in MMA, wrote: “Hey guys quick announcement, I’ve decided to retire from the sport formally known as “Mixed Martial Art” today.

“I wish all my old colleagues well going forward in competition.

“I now join my former partners on this venture, already in retirement.

“Proper Pina Coladas on me fellas!”