Lammtarra (February 2, 1992 – July 6, 2014) was an unbeaten Thoroughbred racehorse. He won three Group One races in 1995. He was voted the Cartier Three-year-old European Champion Colt. He won the Epsom Derby in record time, the King George VI and Queen Elizabeth Stakes and the Prix de l'Arc de Triomphe. The only other horse to win these races was Mill Reef.