José Aldo da Silva Oliveira Júnior, known as José Aldo, is a Brazilian professional mixed martial artist and professional boxer who currently competes in the Bantamweight division of Ultimate Fighting Championship (UFC) after previously competing at Featherweight, and was the fourth and final WEC Featherweight Champion. He became the first UFC Featherweight Champion following the UFC/WEC merger. Aldo is often regarded as one of the greatest mixed martial artists of all-time, and is considered to be the greatest featherweight of all time after defending his UFC title seven times and his WEC title twice.

The Ultimate Fighting Championship (UFC) is an American mixed martial arts (MMA) promotion company based in Las Vegas, Nevada. It is owned and operated by TKO Group Holdings, a majority owned subsidiary of Endeavor Group Holdings. It is the largest MMA promotion in the world as of 2023. It produces events worldwide that showcase 11 weight divisions and abides by the Unified Rules of Mixed Martial Arts. As of 2022, it had held over 600 events. Dana White has been its president since 2001 and CEO since 2023. Under White's stewardship, it has grown into a global multi-billion-dollar enterprise.