Some of the horses mentioned in our list are based on real-life horses, while others are fictional. Secretariat and Seabiscuit, for instance, were real racehorses with outstanding careers. Their lives were so impactful that filmmakers decided to retell their stories on the big screen. On the other hand, Artax from "The Neverending Story," Shadowfax from "The Lord of the Rings," and Maximus from "Tangled" are purely fictional characters created for their respective storylines. The horse Sonador, from "Dreamer: Inspired by a True Story," was based on the life of Mariah's Storm, a racehorse that made a miraculous recovery from a potentially career-ending injury to win several top-class races.