Brianna Ste-Marie (born 30 August 1996) is a Canadian submission grappler, and Brazilian jiu-jitsu (BJJ) black belt athlete.

[1] In December 2020 after getting promoted to brown belt, Ste-Marie became Combat Jiu-Jitsu flyweight champions after defeating Liz Tracy in the final.

[3] In 2021, Ste-Marie won the IBJJF No-Gi Worlds and the American Nationals, both at brown belt[4] On 4 December 2021, after winning the ADCC East Coast Trials, defeating no-gi world champions Raquel Canuto and Nathalie Ribeiro and Jasmine Rocha,[5] Ste-Marie was promoted to Brazilian Jiu-Jitsu black belt,[6] by Brazilian Top Team Canada’s head coach, Fabio Holanda.

[15] Ste-Marie competed against Elisabeth Clay for the vacant featherweight Who's Number One title at WNO: Night of Champions on October 1, 2023.

[17] Ste-Marie was invited to compete in the women's lightweight division of The Crown on November 19, 2023 along with Luiza Monteiro, Janaina Lebre, and Nathalie Ribeiro.

[22] Ste-Marie won a silver medal in the lightweight division of the IBJJF Brazilian National Championship 2024 on April 28, 2024.

[27] She then won a gold medal in the middleweight division of the IBJJF No Gi European Championship on October 20, 2024.