UFC 153: Silva vs. Bonnar was a mixed martial arts pay-per-view event held by the Ultimate Fighting Championship on October 13, 2012, at the HSBC Arena in Rio de Janeiro, Brazil.

Vítor Vieira Belfort is a Brazilian professional boxer and retired mixed martial artist who competed for the Ultimate Fighting Championship (UFC), where he fought in the Heavyweight, Light Heavyweight and Middleweight divisions. He is the UFC 12 Heavyweight Tournament Champion, as well as the former UFC Light Heavyweight Champion and Cage Rage World Light Heavyweight Champion. Known for his explosive knockout power, Belfort is tied for fifth for the most finishes in UFC history with 14. Belfort also competed for MMA promotions Pride FC, Strikeforce, Affliction, and Cage Rage.