Smilla Sundell

Smilla Sundell (born 12 November 2004) is a Swedish Muay Thai kickboxer.

She is currently signed to ONE Championship, where she is the current ONE Women's Strawweight Muay Thai World Champion.

On April 22, 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.

As of December 2023, she is ranked as the number one female featherweight (57.153 kg) Muay Thai practitioner in the world by the WBC Muaythai.

Born in Sundbyberg, Sweden, Sundell started practicing karate at five years old for self-defense.

She first tried her hand at Muay Thai at 10 or 11, while on vacation in Thailand.

Sundell and her family moved to Ko Samui when she was 12 years old due to her parents' careers.

She and her younger sister started practicing Muay Thai at a gym called Yodyut Muay Thai due to a lack of any other sports.

When Sundell was 15, her family moved back to Sweden.

But she stayed in Thailand to pursue Muay Thai.

Running out of opponents in Ko Samui and inspired by watching Stamp Fairtex, in October 2019 she moved to Pattaya and joined the Fairtex Gym, where she currently lives by herself.

In early 2021, Sundell was ranked the number one female featherweight (57.153 kg) Muay Thai practitioner in the world by the WBC Muaythai at 16 years of age.

She has notable victories over decorated champion Sawsing Sor Sopit, Ponpan Por.Muengpetch, and male fighter Bongsak Sitpholek.

After amassing a record of 31 wins, 5 losses and 1 draw, Sundell signed with ONE Championship in 2021.

In her ONE Championship debut at ONE: Full Circle on 25 February 2022, Sundell faced Australia's Diandra Martin.

She won the fight by TKO in round 3.

This was her first fight in four-once MMA gloves, which are smaller than the usual gloves used in Muay Thai.

At ONE 156 on 22 April 2022, she challenged Jackie Buntan for the inaugural ONE Women's Strawweight Muay Thai World Championship.

Sundell won by unanimous decision, making her the youngest person to ever win a world title.

The fight also earned her a $50,000 Performance of the Night bonus.

Sundell made her kickboxing debut against Milana Bjelogrlić at ONE Friday Fights 18 on May 26, 2023.

She won the fight by unanimous decision.

Sundell made her first Women's Muay Thai Strawweight World title defense against Allycia Rodrigues at ONE Fight Night 14 on September 29, 2023.

She retained the championship by a third-round technical knockout.

She also earned her second $50,000 Performance of the Night bonus.

! style=background:white colspan=9 |Defended the ONE Women's Strawweight Muay Thai World Championship.

! style=background:white colspan=9 |Won ONE Women's Strawweight Muay Thai World Championship.

! style=background:white colspan=9 |For the WPMF World 115 lbs title.