Getty The 2026 Kentucky Derby features a deep and competitive field, but So Happy has become one of the more talked-about contenders ahead of the race. The colt enters off a win in the Santa Anita Derby and brings a combination of recent success and a story tied closely to the people behind him. According to BloodHorse , So Happy’s path to the Derby is closely connected to breeder Leverett Miller and his late wife, Linda Miller. So Happy’s Background Reflects Decades of Work by the Miller