Nashwan (1986–2002) was an American-bred, British-trained Thoroughbred racehorse and sire. After winning both his starts as a two-year-old, he developed into an outstanding performer in the spring and summer of 1989, completing a unique four-timer when winning the 2000 Guineas, Epsom Derby, Eclipse Stakes, and King George VI and Queen Elizabeth Stakes. After sustaining his only defeat in the Prix Niel in September, he was retired to stud where he was a successful sire of winners.