UFC 291: Poirier vs. Gaethje 2 was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on July 29, 2023, at the Delta Center in Salt Lake City, Utah, United States.

[3] They also competed for the symbolic "BMF" (baddest motherfucker) title, which was vacated after the original holder Jorge Masvidal retired in April.

[11] Joanne Wood was expected to face Priscila Cachoeira in a women's flyweight bout on the preliminary card.

[16] Former UFC Middleweight Championship challenger Paulo Costa and Ikram Aliskerov were expected to meet at the event.

[17] However, the promotion opted to scrap the pairing and instead move them to UFC 294 in October matching them up with Khamzat Chimaev and Nassourdine Imavov, respectively.