Women's bantamweight champion Julianna Peña faces No. 2 ranked contender Kayla Harrison in the UFC 316 co-main event.

Julianna Pena defeats Amanda Nunes to win the UFC women's bantamweight title, one of the biggest upsets in UFC history.

After dethroning Raquel Pennington to become champion at UFC 307, Peña dismissed Kayla Harrison (18-1 MMA, 2-0 UFC) and called out Nunes. However, Peña now has changed her tune and values a win over Harrison more than beating Nunes a second time.

Merab Dvalishvili and Sean O'Malley will headline UFC 316 in a bantamweight rematch on June 7, per ESPN's Brett Okamoto. Dvalishvili and O'Malley last fought at UFC 306 in September, where Dvalishvili claimed the UFC Championship via unanimous decision.

Undisputed bantamweight champion, Julianna Pena is reportedly in line for her first defense of her second reign at the division limit in June, taking on

Dvalishvili, 34, enters on a 12-fight win streak and fresh off arguably the best win of his career against Umar Nurmagomedov, where he was a betting underdog to the unheralded challenger. O'Malley, 30, has not competed since the loss to Dvalishvili.

Following the announcement of the UFC 316 headliners, experts react to the fights and provide early betting analysis.

Two blockbuster bantamweight title fights are set for UFC 316 at the Prudential Center in Newark, New Jersey, on June 7, 2025. UFC CEO Dana White announced on April 1, 2025, that Merab Dvalishvili will defend his men’s 135-pound belt against Sean O’Malley in a rematch,