The Irishman announced on Twitter that he will fight Poirier on January 23, 2021 and hopes to stage the fight in the Dallas Cowboys’ AT&T Stadium.
The pair have fought before. In 2014, with McGregor beating the American in the first round.
Last month, McGregor said on Twitter that he would be coming out of retirement to fight 41-year-old boxer Manny Pacquiao.
The former two-division UFC World Champion, said he’s “boxing Manny Pacquiao next in the Middle East.”
McGregor has fought one boxing match before, losing in the 10th round to boxing legend Floyd Mayweather Jr. in 2017.
After his initial tweet about facing Pacquiao, McGregor said in a second tweet: “It will be a true honor to have faced two of the greatest boxers of the modern era.”