Joseph O'Brien is an Irish horse trainer and former jockey, known for his success in the world of horse racing. He was born on June 24, 1993, and is the son of the famous trainer Aidan O'Brien. Joseph began his career as a jockey, winning several prestigious races, including the Derby and the Breeders' Cup. After retiring from riding in 2015, he transitioned to training horses and quickly made a name for himself. O'Brien has trained numerous winners, including those in major races like the Irish Derby and the Royal Ascot. His achievements have established him as a prominent figure in the racing industry.