The most popular and famous UFC fighter is probably Conor McGregor. He is a former two-division champion, having held the featherweight and lightweight titles simultaneously. He is also the first fighter in UFC history to hold two belts at the same time. McGregor has headlined five out of the six highest-selling pay-per-view events in UFC history, and was the first to reach 10 million pay-per-view buys. He is one of the most recognizable figures in mixed martial arts and is an international superstar.