UFC officials have released the official poster for UFC 155, which will be headlined by a highly anticipated rematch between former UFC heavyweight champion Cain Velasquez and current UFC heavyweight champion Junior Dos Santos.

The two top-ranked heavyweights first squared off at UFC on FOX on Nov. 12 of last year. The bout was the first UFC headliner to appear on FOX since the organization inked a 7-year 90 million dollar television deal with the broadcast giant -- and it didn't disappoint.

Dos Santos opened the fight by keeping Velasquez at a distance with his footwork and forcing stand out wrestler to trade blows standing with the dangerous Brazilian. Very quickly soon after, Dos Santos landed a powerful overhand right which dropped Velasquez, and he followed up with precises, powerful ground-and-pound which put the former champion away, just seconds into the first round.

Since then, Velasquez has gone on to finish former Strikeforce top contender Antonio Silva at UFC 146 via TKO in the first round. The impressive victory earned him a rematch.

UFC 155 is scheduled for Dec. 19 at the MGM Grand Garden Arena in Las Vegas, Nevada, and it will be the last UFC event for 2012.

Below is the official event poster: