Conor McGregor, a former Irish Ultimate Fighting Championship (UFC) featherweight and lightweight champion, has announced his retirement from fighting, according to Tass news agency.

"Hey guys. I’ve decided to retire from fighting. Thank you all for the amazing memories! What a ride it’s been!" the 31-year-old McGregor wrote on his Twitter account, posting a picture with his mother at one of the world title wins.

It was not the first time McGregor has announced his retirement.

In 2016 while preparing for a rematch with mixed martial artist Nate Dia, McGregor made his first announcement about his plant to retire.

However, after talks with UFC President Dana White, McGregor returned to the octagon and won a championship belt.

McGregor also announced plans to wrap up his sports career in March 2019 after defeating US mixed martial artist Donald Cerrone in the first round.

McGregor is one of the most popular UFC (Ultimate Fighting Championship) fighters boasting a record of 22 wins and four defeats.

He won his first champion’s title of the UFC in 2015 and eventually became the first MMA fighter to simultaneously hold the champion’s belts in the UFC featherweight and lightweight divisions.