American professional boxer, Floyd Mayweather Jr, and Conor McGregor are getting ready for what is dubbed the most expensive fight in boxing history.

The countdown has begun to what is being billed as the Fight of the Century, as Conor McGregor gets set to take on Floyd Mayweather who is widely considered to be one of the greatest boxers of all time.

The fight is likely to break all records and surpass the $600million (£468million) generated by Mayweather’s 2015 fight with Manny Pacquiao.

The boxers have made their final face off where they checked their weight ahead of their mega money fight, which takes place at the T-Mobile Arena in Las Vegas, tonight.

Mayweather Jr on his Instagram had flaunted 25 stacks of $100 dollar bills on board his private jet and captioned “Champion Predictions.”

Undefeated as a professional, and a five-division world champion, Mayweather has won fifteen world titles and the lineal championship in four different weight classes twice at welterweight.

Daily Mail reports that an audience packed with 20,000 ravenous fans is expected at the T-Mobile Arena in Las Vegas, USA, with private jets ferrying celebrities into Sin City as bets worth more than a million dollars are placed on the bout.

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Floyd Mayweather Jr, Conor McGregor shows off their physique before fight