The only athlete to win an Oscar is former professional athlete and actor Jim Thorpe. He received an Academy Award for his portrayal of himself in the 1951 film "The Jim Thorpe Story." Known for his incredible prowess in multiple sports, including football and track and field, Thorpe remains an iconic figure in sports history. His achievements on the athletic field, combined with his later work in film, have solidified his legacy as both an athlete and an entertainer, illustrating the crossover of sports and Hollywood.