Mexico’s undefeated ladies’s flyweight “Kill Invoice” Regina Tarin has formally signed with the UFC and can make her promotional debut on Saturday, February 28, 2026, at UFC Mexico in Enviornment CDMX, Mexico Metropolis. The 21‑12 months‑previous steps in on quick discover to interchange Sofia Montenegro, who withdrew from a scheduled ladies’s flyweight bout with Lithuanian opponent Ernesta “Heavy‑Handed” Kareckaite for causes not disclosed.
“Kill Invoice” Regina Tarin Makes UFC Debut Towards Ernesta Kareckaite in Mexico Metropolis
The matchup will now be contested at a 130‑pound catchweight, a change first reported by Marcel Dorff of Eurosport. Tarin holds an ideal 7–0 skilled document, with all of her wins coming by end besides a 2024 unanimous‑resolution victory over Andrea Garcia. 4 of her seven wins have come through knockout, and nearly all of these finishes occurred inside the primary spherical, which is a part of why she has drawn consideration as a rising Mexican expertise.
Tarin’s final outing was in November 2025 at Robust N Xtreme 1125 in Costa Rica, the place she knocked out Yurivia Jimenez simply over two minutes into their co‑primary occasion encounter. Earlier in 2024, she claimed the vacant Budo Sento Championship ladies’s bantamweight title with a fourth‑spherical TKO of Luisa Cifuentes, including a regional belt to her rising resume. She additionally owns a stoppage win over Kaytlin Neil, a former contestant on Season 30 of The Final Fighter, throughout a Combate World look in 2024.
Her alternative towards Kareckaite comes at a busy time in her profession. Tarin had been scheduled to compete in a Muay Thai bout at Budo Sento Championship 33 this week earlier than being known as to the UFC, and he or she beforehand spent a number of days on the WWE Efficiency Heart in January 2026 for a tryout. Public experiences notice she was the one Mexican lady invited to that exact WWE coaching session, highlighting curiosity in her from past the MMA world.
Kareckaite, a 27‑12 months‑previous from Lithuania, carries a 6–1–1 document and is 1–1 contained in the Octagon to this point. She earned her UFC contract by way of Dana White’s Contender Collection in 2023 with a break up‑resolution win over Carli Judice, then went on to defeat Nicolle Caliari through break up resolution in January 2025. Her UFC debut was a loss to former title‑hopeful Dione Barbosa by unanimous resolution at UFC 301.
Regina Tarin has framed the combat as a serious milestone, writing on Instagram that “Los planes de Dios son perfectos y a la gente buena le pasan cosas buenas siempre” and calling Saturday her UFC debut second in Mexico. As one in every of a number of Mexican fighters on the cardboard, she is going to look to start out her UFC journey with a robust assertion inside the primary 130‑pound contest of her profession.
