Ronda Rousey just made MMA history ... becoming the very first female fighter to join the UFC ... TMZ has learned.
Rousey -- a former U.S. Olympian -- has officially joined Dana White's MMA organization ... and automatically becomes the 135 lb women's champion.
We're told 25-year-old Ronda will defend her title in 2013 -- possible opponents include Sara McMann, Cris Cyborg and rival Miesha Tate.
Rousey has been fighting in Strikeforce since last year and emerged as a superstar ... beating the living crap out of just about everybody she's faced. In fact, she's undefeated.
And there's more ... sources say Strikeforce, which airs on Showtime, will be running its last event in January before folding up shop for good.
A rep for Strikeforce had no comment.
Read more: http://www.tmz.com/2012/11/08/ronda-...#ixzz2BgU5J4gP
Great move if true, Women in the UFC is huge.