Joanna Jedrzejczyk is a Polish mixed martial artist who competes in the women's strawweight division of the Ultimate Fighting Championship. She won the UFC Women's Strawweight Championship on March 14, 2015 at UFC 185. She also competed in Muay Thai for 10 years, winning 70 matches and six world championships and four European championships. She has a professional kickboxing record of 27 wins and 2 losses and an amateur kickboxing record of 37 wins and 3 losses.