Dylan Thomas (foaled 23 April 2003) is a retired Irish Thoroughbred racehorse and active sire. In a racing career which lasted from June 2005 until December 2007, he ran twenty times and won ten races. After winning two minor races in 2005 he improved to become one of the leading European three-year-olds of 2006, winning the Irish Derby and the Irish Champion Stakes as well as finishing a close third in The Derby. In 2007 he won three of Europe's most important weight-for-age races, taking the King George VI and Queen Elizabeth Stakes at Ascot, a second Irish Champion Stakes and the Prix de l'Arc de Triomphe at Longchamp. His performances led to his being named European Horse of the Year in 2007.