Irish MMA fighter who became the UFC Featherweight Champion in December 2015 after knocking out Jose Aldo in 13 seconds, setting the record for the fastest championship victory in the history of the UFC. He also became the first UFC double champion in 2016 after beating Eddie Alvarez in the lightweight division.
He made his professional debut in 2008, and won his first two bouts by way of TKO.
He made his UFC debut in 2013, and earned the Knockout of the Night in his first fight. In August 2017, he was defeated in his boxing debut by Floyd Mayweather Jr. In 2018, he launched his own Irish whiskey brand called Proper No. Twelve after the neighborhood he grew up in.
He was born in Dublin, Ireland and raised alongside his sisters Aoife and Erin. He has been in a long term relationship with Dee Devlin. They've been engaged since 2020. He and Dee welcomed a son named Conor Jr. in 2017, a second child named Croia in 2019 and a third named Rían in May 2021. In June 2023, they announced they were expecting a fourth child.
He has a long-standing rivalry with Nate Diaz, who defeated McGregor in their first bout by submission, but McGregor was later able to defeat Diaz in the rematch by majority decision.