Report: Ronda Rousey officially the first woman in the UFC

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.

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