UFC 92: The Ultimate 2008 was a mixed martial arts (MMA) pay-per-view event held by the Ultimate Fighting Championship (UFC) on December 27, 2008 at the MGM Grand Garden Arena in Las Vegas, Nevada.

The main event featured UFC Light Heavyweight Champion Forrest Griffin, against undefeated challenger Rashad Evans. This was the first time that two winners of The Ultimate Fighter competed in a title fight against each other.

The first co-main event saw former UFC Heavyweight Champion Frank Mir against former Pride Heavyweight Champion and Interim UFC Heavyweight Champion Antônio Rodrigo Nogueira.

The other co-main event was a rubber match between former UFC Light Heavyweight Champion Quinton Jackson and former PRIDE Middleweight champion Wanderlei Silva. Silva had won their previous two matches in the PRIDE organization in Japan.

Antoni Hardonk was originally scheduled to face Mark Burch, who was injured and replaced by Mike Wessel.

The following fighters received $60,000 bonuses.

def. Forrest Griffin: $100,000

def. Antônio Rodrigo Nogueira: $250,000