The UFC Fight Night show will be headlined by Cory Sandhagen vs. T.J. Dillashaw at a yet-to-be-announced location.
Ribas (10-2) will be entering the cage for the first time since suffering her first octagon loss in January, a second-round knockout defeat to fellow Brazilian 115-pounder Marina Rodriguez.
Ribas went 4-0 in her previous UFC appearances against Paige VanZant, Randa Markos, Mackenzie Dern and Emily Whitmire.
Hill (13-9) last fought in March, defeating Ashley Yoder via decision at UFC Vegas 21 to bounce back from close split decision defeats to Claudia Gadelha and Michelle Waterson.
A former Invicta FC strawweight champion, “Overkill” is 7-7 in her second UFC run with wins over the likes of Maryna Moroz, Loma Lookboonmee and Hannah Cifers.
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