Smilla Sundell

Smilla Sundell (born 12 November 2004) is a Swedish Muay Thai fighter, kickboxer, and mixed martial artist. She competed in ONE Championship, where she was the former ONE Women's Strawweight Muay Thai World Champion. She currently competes in the women's Bantamweight division of the Ultimate Fighting Championship (UFC). On 22 April 2022, Sundell became the youngest person to ever win a world title in Muay Thai by defeating Jackie Buntan to win the inaugural ONE Women's Strawweight Championship at 17 years and 5 months. Since 2026, she has competed for the American MMA promotion Tuff-N-Uff, remaining undefeated through her first two professional bouts.

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