Ronda Jean Rousey, born on February 1, 1987, in Riverside County, California, is an iconic figure in the world of mixed martial arts, professional wrestling, and judo. She is best known for her groundbreaking achievements in the Ultimate Fighting Championship (UFC) and World Wrestling Entertainment (WWE), marking her as a trailblazer for women in combat sports. Rousey's career has been characterized by her fierce competitive spirit, athletic prowess, and ability to captivate audiences both inside and outside the ring.

Growing up in a family of athletes, Rousey was introduced to judo at an early age by her mother, Ann Maria Rousey DeMars, a former world champion in the sport. Rousey became the first American woman to win an Olympic medal in judo, securing a bronze at the 2008 Summer Olympics in Beijing. This achievement set the stage for her transition into mixed martial arts, where she began her professional career in 2011 with King of the Cage. Rousey quickly gained attention for her dominant grappling skills and finishing ability, which led her to sign with Strikeforce, where she became the organization’s last Women's Bantamweight Champion.

In 2013, Rousey made history by becoming the first female fighter signed by the UFC and headlining the promotion's inaugural women's bout at UFC 157. She went on to become the first UFC Women's Bantamweight Champion, successfully defending her title six times, a record for female fighters at the time. Rousey's impact on the sport was monumental, as she not only elevated the profile of women's combat sports but also became the first woman to feature in the UFC's pound-for-pound rankings. Her career in the UFC culminated in her induction into the UFC Hall of Fame in 2018, solidifying her legacy in the sport.

After retiring from mixed martial arts in 2016, Rousey transitioned to professional wrestling, signing with WWE in 2018. She made her debut at WrestleMania 34 and quickly became a prominent figure in the organization. Rousey won the Raw Women's Championship at SummerSlam that year and headlined the first all-women's pay-per-view event, Evolution, where she defended her title. Her tenure in WWE saw her become the first female champion in both the UFC and WWE, as well as the only woman to headline a pay-per-view event in both promotions. Rousey captured the SmackDown Women's Championship twice and became an eighth Women's Triple Crown Champion when she won the WWE Women's Tag Team Championship with fellow wrestler Shayna Baszler.

Beyond her athletic accomplishments, Rousey has ventured into acting, appearing in films such as The Expendables 3, Furious 7, and Mile 22. In 2015, she published her autobiography, "My Fight / Your Fight," which chronicles her journey in sports and personal life. Rousey's influence has been recognized widely, including being voted the best female athlete of all time in a 2015 ESPN fan poll, and she has been described by Fox Sports as "one of the defining athletes of the 21st century." As of October 2023, Rousey has left WWE and is engaging with the independent wrestling circuit, continuing to inspire a new generation of athletes and fans. Her journey remains a testament to her relentless drive and pioneering spirit in combat sports.