Anderson Silva will return to the 205-pound division for a bout with Stephan Bonnar at UFC 153, but the middleweight champion must first hit the scale as a light heavyweight for the first time since he humiliated Forrest Griffin in August 2009.
For Bonnar, this fight with Silva will offer him a chance to ride off into the sunset after recently contemplating retirement on an episode of Fuel TV's UFC Tonight.
Bonnar has won three straight fights, but the 35-year-old has been campaigning for bigger fights to end his career on.
As a result of injuries to former UFC 153 headliners Jose Aldo and Quinton Jackson, Bonnar finally received the big fight he was looking for. In fact, there probably wasn't a fight any bigger than this that he could have asked for.
In addition to the 205-pound main event, Saturday's event will also feature the return of Antonio Rodrigo Nogueira, who will meet Dave Herman.
Nogueira has been out of since suffering a broken arm in a December 2011 bout with Frank Mir. The Brazilian found himself caught in a kimura and refused to tap until his arm snapped.
Before Saturday's event, which will take place at the HSBC Arena in Rio de Janeiro, Brazil, the fighters will hit the scales on Friday at 3 p.m. ET.
Video of the weigh-ins will be streamed live on the above video player. After the weigh-ins, stay tuned to Bleacher Report for all the latest on UFC 153 and the rest of your MMA needs.