Gavin and Joe Maloof are so confident Floyd Mayweather Jr. will beat Conor McGregor that they bet $880,000 on it.

And if the Maloof brothers are big winners along with Mayweather on Aug. 26, they are giving the proceeds of their whopping wager to charity.

The wealthy entrepreneurs and former Sacramento Kings owners revealed their extraordinary bet to The Associated Press on Sunday, two days after they placed the wager in Las Vegas.