It's almost judgment day for Conor McGregorIreland's MMA sensation will face the toughest test of his sensational career at UFC 189 in Las Vegas this weekend, as he steps into the Octagon to fight Chad Mendes for the interim featherweight title.

Since making his debut for Dana White's promotion in April 2013, McGregor has become the most talked about cage fighter on the planet with his effortless blend of headline-chasing sound bites and devastating punching power. He's basically MMA's answer to Floyd Mayweather. Here are 10 Things You Didn't Know About Conor McGregor.