Conor McGregor makes his entrance before his fight with Floyd Mayweather Jr. in August 2017
Conor McGregor is known for his controversial, bragging persona in and out of the ring, which draws record numbers of viewers to his fights.
The 29-year-old Ultimate Fighting Champion was born in Dublin, Ireland, and began his mixed martial arts career at age 18 in an amateur match for the Irish Ring of Truth in his hometown.
He soon went professional and debuted in the MMA in 2009, collecting wins both as a lightweight and a featherweight.
McGregor is the first European MMA fighter to hold titles from two divisions - featherweight and lightweigh - simultaneously.
In 2013, after being swarmed by requests to sign McGregor to the UFC during a trip to Ireland, the organization's president Dana White complied and the fighter became the second-ever Irishman to compete for the organization.
McGregor has said that he collected a $200 check from Ireland's welfare state just one week before his UFC debut, when he was working as a plumber.
He drew the biggest pay-per-view audience for an MMA fight ever when he fought Nate Diaz at UFC 202 in 2016 and defeated him. For that fight he earned $1million, becoming the first UFC fighter to get a seven-figure pay day.
That year he became the first MMA fighter ever to be included on Forbes' list of highest-paid athletes.
McGregor has been in a relationship with Dee
