Billy Mills is a former American long-distance runner, best known for winning the gold medal in the 10,000 meters at the 1964 Tokyo Olympics. He is the first and only American to win this event, achieving a stunning upset against favored competitors. Mills is a member of the Oglala Lakota tribe and has used his platform to advocate for Native American rights and issues. After his Olympic success, Mills continued to compete professionally and became a motivational speaker. He has inspired many through his story of perseverance and determination, emphasizing the importance of dreams and hard work. His life and achievements are celebrated in the documentary film, Running Brave.