Cage Warriors (CW) is an Irish-owned mixed martial arts (MMA) promotion company based in London, England. The promotion was established in 2001 and staged its first MMA event in London in July, 2002.

Conor Anthony McGregor is an Irish professional mixed martial artist, professional boxer and actor. He is a former Ultimate Fighting Championship (UFC) Featherweight and Lightweight Champion, becoming the first UFC fighter to hold UFC championships in two weight classes simultaneously. He is also a former Cage Warriors Featherweight and Lightweight Champion.