You wanted it? Well, you got it.

UFC President Dana White today confirmed that reigning UFC Welterweight Champion Georges St. Pierre will defend his title against Strikeforce 170-pound kingpin Nick Diaz at UFC 137 at the Mandalay Bay Events Center on Oct. 29 in Las Vegas.

Champion vs. Champion.

As recently as just a few days ago, White was dispelling rumors of the potential blockbuster match-up, shooting down the fight with claims that there were still "many hurdles" to overcome to make the fight happen.

And while it appeared possible for a short time that Showtime may have nixed the bout, it's all systems clear for a Halloween weekend showdown later this year.

St. Pierre is fresh on the heels of one of his least inspired performances since regaining the welterweight title from Matt Serra back at UFC 83 in April 2008. "Rush" went toe-to-toe with Jake Shields for five rounds up in the Great White North and not only failed to secure a finish, but lost a couple rounds on two of the judges scorecards.

It was the first time he had failed to win every round since his Aug. 2007 fight against Josh Koscheck.

To make matters worse, the French-Canadian suffered an eye injury that could have been much worse than it ultimately was. He's already cleared and back in the training room, however, and he's got his next opponent.

Nick Diaz, who recently scored an improbable come-from-behind victory via first round technical knockout over British striker Paul "Semtex" Daley back on April 9, has been vocal about finding new challenges outside the Strikeforce promotion.

The Stockton, Calif., native is riding a 10-fight win streak and has finished all but one of his opponents in dominating fashion.

He's maintained the whole way that while he despises his "miserable" life of training and eating and training and fighting and training, he just wants to get paid.

A date with perennial pay-per-view powerhouse Georges St. Pierre is surely set to line his pockets with paper.

Now that the speculation can come to a close as to whether or not the superfight is going to happen, let the speculation begin on who will come away victorious.

This will be the first time Diaz has fought under the UFC banner since a Nov. 2006 win over Gleison Tibau. He hasn't fought in Las Vegas since Feb. 2007, a submission win over Takanori Gomi (later overturned to a no contest thanks to a failed drug test) under the Pride banner.

St. Pierre heads back to "Sin City" for the first time since his unanimous decision beatdown of Thiago Alves at UFC 100 back in July 2009.

Georges St. Pierre vs. Nick Diaz for the UFC welterweight championship of the world, Maniacs.

Who ya got?

Remember to stay tuned to MMAmania.com for more details on this monster announcement as they become available.