For complete UFC 131 weigh in results click here.

UFC 131: "Dos Santos vs. Carwin" is now officially official for Saturday, June 11, 2011 at the Rogers Arena in Vancouver, British Columbia, Canada.

The event will feature heavyweight knockout kings Junior dos Santos and Shane Carwin squaring off for the right to face Cain Velasquez for the heavyweight title later this year.

"The Engineer" is a late replacement for Ultimate Fighter (TUF) 13 coach Brock Lesnar, who was forced off the card thanks to a second flare-up of diverticulitis that required major surgery.

In addition, Kenny Florian makes his featherweight debut against Diego Nunes in a pivotal 145-pound match-up, while middleweight mashers Mark Munoz and Demian Maia will hit the mats earlier in the evening.

It's going to be a fun night of fights so don't miss it. And remember to check us out for all the pre, during and post-fight UFC 131 coverage you can handle.

Check out the Dos Santos vs. Carwin staredown video, as well as Florian vs. Nunes, after the jump: