The undefeated ‘Kill Bill’ will intervene at UFC Mexico City on short notice

A 21-year-old prospect with a 7-0 record will make her Octagon debut on less than a week’s notice at UFC Mexico City.The Las Vegas-based promotion confirmed Wednesday that Regina Tarin will replace the injured Sofia Montenegro and face Ernesta Kareckaite in a 130-pound catchweight bout this Saturday. UFC Mexico City – also known as UFC Fight Night 268 – takes place at Arena CDMX in Mexico City, Mexico and is headlined by a 125-pound scrap pitting Brandon Moreno against Lone’er Kavanagh. The card will air in its entirety on Paramount+, starting with the preliminaries at 5:00 PM ET/2:00 PM PT before moving on to the main event at 8:00 PM ET/5:00 PM PT.

A double threat

Tarin, who goes by the nickname “Kill Bill,” has made a name for himself on the regional circuit in Mexico, winning the Budo Sento bantamweight crown in 2024 and also racking up a trio of victories under the Combate Global banner. The Mexico City native has won all but one of her victories from distance. Reportedly also Tarin tried for World Wrestling Entertainment earlier this year.Lithuanian Kareckaite is 1-1 inside the Octagon since earning a UFC contract on Dana White’s Contender Series in 2023. Most recently, the 27-year-old known as ‘Heavy Hands’ earned a split verdict over Nicolle Caliari at UFC Fight Night 249 in January 2025.