Conor Anthony McGregor (born 14 July 1988) is an Irish professional mixed martial artist who is currently signed to the Ultimate Fighting Championship . Throughout his career, he has competed as a featherweight, lightweight and welterweight. McGregor is the current UFC Featherweight Champion. In 2008, McGregor started his mixed martial arts career and, in 2012, he won both the Cage Warriors Featherweight and Lightweight Championships, holding both titles concurrently before vacating them to sign with the UFC. In 2015, McGregor became the first Irish-born UFC champion after he defeated José Aldo, at UFC 194, via knockout after 13 seconds in the first round. This was the fastest victory in UFC title fight history. He is known for being one of the biggest pay-per-view draws in MMA as well as his extravagant lifestyle and trash talking.