Bigstone (8 February 1990 – 2002) was an Irish-bred, French-trained Thoroughbred racehorse and sire. As a three-year-old he became the only French-trained horse to win both of Britain's most important all-aged mile races, the Sussex Stakes and the Queen Elizabeth II Stakes. Unraced as a two-year-old, Bigstone raced fourteen times, winning five times in a racing career which lasted from March 1993 until November 1994. After his successes in England in 1993 he added two more Group One races in France as a four-year-old, winning the Prix d'Ispahan and the Prix de la Forêt. He was then retired to stud where he had mixed success as a sire of winners.