Ultimate Fighting Championship (UFC) held weighs ins for UFC 158 earlier today (March 15, 2013), and saw all 24 fighters scheduled to compete on the card make weight, which means the 12-bout card that goes down tomorrow night at the Bell Centre in Montreal, Quebec, Canada, is now official.

Conclusion of the weigh ins means tomorrow night's fights, headlined by a welterweight championship showdown pitting the sensational Georges St. Pierre against his arch rival and nemesis, Nick Diaz, are one-step closer to becoming a reality. All that remains are the winners and losers to be determined inside the Octagon live on pay-per-view.

For complete UFC 158 weigh-in results click here. And don't forget to check out all the major players squaring off at today's weigh-in event here.

MMAmania.com will provide LIVE round-by-round, blow-by-blow coverage of the main card action on fight night (Sat., March 16, 2013), which is slated to air at 10 p.m. ET on pay-per-view. The latest quick updates of the live action will begin to flow earlier than that around 6:30 p.m. ET with the "Prelims" bouts on Facebook and FUEL TV.

For all the latest "St. Pierre vs. Diaz" news and notes click here.