Undefeated ‘Kill Bill’ steps in on short notice at UFC Mexico City

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 on 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
airs in its entirety on Paramount+, beginning with prelims at 5
p.m. ET/2 p.m. PT before moving on to the main draw at 8 p.m. ET/5
p.m. PT.

🚨OFICIAL🚨 Regina Tarín hace su debut en
corto aviso en
#UFCMexico

Talento del programa del UFC PI 🇲🇽 pic.twitter.com/MYHkOhdZHW

— UFC Español (@UFCEspanol)
February 25, 2026

A Dual Threat

Tarin, who is nicknamed “Kill Bill,” has made her name on the
regional circuit in Mexico, winning the Budo Sento bantamweight
crown in 2024 and also securing a trio of victories under the
Combate
Global banner. The Mexico City native has finished all but one
of her triumphs inside the distance. Tarin also reportedly tried out for World Wrestling Entertainment
earlier this year.

Lithuania’s Kareckaite is 1-1 in 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” garnered a split verdict over
Nicolle Caliari at UFC Fight Night 249 in January 2025.