UFC 126: Silva vs. Belfort was a mixed martial arts pay-per-view event held by the Ultimate Fighting Championship on February 5, 2011, at the Mandalay Bay Events Center in Las Vegas, Nevada.

[3] Former Light Heavyweight Champion Vitor Belfort was scheduled to fight Yushin Okami at UFC 122.

[4] However, UFC President Dana White said that Belfort would instead challenge Middleweight Champion Anderson Silva for the belt.

Sam Stout was originally scheduled to face Paul Kelly at this event, but dropped off of the card due to injury.

Donald Cerrone stepped in to replace him, in what would become the first UFC lightweight fight featuring a fighter imported from the World Extreme Cagefighting following their merger in December 2010.