East of the Moon was a French Thoroughbred racehorse. She was bred in the United States by Flaxman Holdings Ltd., the breeding arm of the racing stables of shipping magnate Stavros Niarchos. She was sired by multiple American Grade 1 winner Private Account, a son of U.S. Racing Hall of Fame inductee, Damascus. Her dam was Niarchos's French star and U.S. Racing Hall of Fame inductee, Miesque who twice won the Breeders' Cup Mile.