Sea Sovereign was an American Thoroughbred stallion foaled in 1942 and bred by the owner of Seabiscuit: Charles Howard. Although he achieved moderate success as a racehorse, he is most famous for being part of the line sired by Seabiscuit. The fine lines of Sea Sovereign's posture, along with his light bay coloring, resulted in the horse appearing in a Shirley Temple film portraying the career of Seabiscuit.