UFC 141: Lesnar vs. Overeem was a mixed martial arts pay-per-view event held by the Ultimate Fighting Championship on Friday December 30, 2011, at the MGM Grand Garden Arena in Las Vegas, Nevada.

[6] This event marked Brock Lesnar's return to MMA action after being out for over a year due to diverticulitis.

[7] The winner of the main event was expected to face Junior dos Santos in a bout for the UFC Heavyweight Championship.

Grant was originally scheduled to face Jacob Volkmann at this event but was forced to pull out due to an undisclosed injury, and was replaced by returning veteran Efrain Escudero.

[11] Matthew Riddle was scheduled to face Luis Ramos, but the bout was cancelled only moments before the fight due to Riddle being ill.[12] Ramsey Nijem was scheduled to face Anthony Njokuani at the event but was forced to pull out due to an undisclosed injury, and replaced by Danny Castillo.