Ketlen Vieira da Silva[7] (born 26 August 1991) is a Brazilian professional mixed martial artist who currently competes in the women's Bantamweight division of the Ultimate Fighting Championship (UFC).
[5][9] She is also a decorated wrestler with multiple prestigious titles, including Brazilian national wrestling championship.
[10] She studied law at University Nilton Lins, but dropped out in order to pursuit a career in mixed martial arts.
[11] She eventually transitioned to MMA and trained under Marcinho Pontes, who was José Aldo's early coach at Nova Uniao Manaus gym.
[4][9][13] Vieira made her promotional debut on 1 October 2016, at UFC Fight Night: Lineker vs. Dodson in Portland, Oregon, United States.
[17] After three rounds, the judges handed the victory to Vieira via unanimous decision with the score board of (29–28, 30–27, 29–28).
[23] A bout against Germaine de Randamie was announced for UFC Fight Night: Machida vs. Anders on 3 February 2018.
[26] Vieira was scheduled to face Tonya Evinger on 22 September 2018, at UFC Fight Night: Santos vs.
[31] Due to the event being relocated to the United States, Vieira being unable to compete due to visa issues:[32] However, on 9 April, Dana White, the president of UFC announced that this event was postponed to a future date[33] Instead, Vieira was scheduled to face Yana Kunitskaya on 1 August 2020, at UFC Fight Night: Holm vs. Aldana,[34] and on 15 July 2020, it was announced that the bout was moved to UFC Fight Night 174 on 8 August 2020.
[35] Subsequently, Vieira was removed from the card on 30 July for undisclosed reasons and replaced by Julija Stoliarenko.
[39] The bout with Yana Kunitskaya was rescheduled and eventually took place on 20 February 2021, at UFC Fight Night 185.
[58] Viera faced 2019 and 2021 PFL Women's Lightweight Champion Kayla Harrison on 5 October 2024 at UFC 307.