Conor McGregor has issued a shout out to his “brother” Justin Bieber, who he says will be supporting him when he makes his UFC comeback in Las Vegas.

The Crumlin fighter spoke of his friendship with the Canadian superstar, just days after his UFC bout against Michael Chandler was announced.

The pair will square up in Vegas on June 29.

McGregor shared photos of him and ‘Baby’ singer Bieber on a tennis court in the Bahamas.

The Dubliner also shared photos of the pair sun bathing and enjoying drinks in the Beverly Hills hotel in LA several years ago.

Justin Bieber and Conor McGregor in the Beverly Hills hotel

Writing on Instagram, McGregor described Bieber as his “brother” and declared: “the Mac has your back for life!”

“From Beverly Hills to the Bahamas! See you in Vegas bro, it’s game on, the Mac is back!”

McGregor then went on to state how he would be enjoying himself for the next few days before entering training for his June fight against Chandler.’

“Five more nights on the delicious and then that be that see ya’s tonight IM NOT F******G LEAVING,” he wrote.

McGregor has been letting his hair down this week and shared photos of him with punters in his Dublin pub, the Black Forge Inn.

Earlier this week, it was confirmed that McGregor will make his long-awaited return to the Octagon on June 29 when he takes on Michael Chandler at UFC 303 in Las Vegas.

It has been three years since McGregor last fought in the UFC after breaking his left leg in the first round of his trilogy fight with Dustin Poirier.

The UFC confirmed that the welterweight bout will be contested over five rounds, taking place at the end of International Fight Week.