Sunday Silence (1986–2002) was an American-bred Thoroughbred racehorse and Sire. In 1989 he won the Kentucky Derby and the Preakness Stakes but failed to complete the Triple Crown when he was defeated in the Belmont Stakes. Later in the same year he won the Breeders' Cup Classic and was voted American Champion Three-Year-Old Colt and American Horse of the Year. Sunday Silence's racing career was marked by his rivalry with Easy Goer the 1988 American Champion Two-Year-Old Colt who defeated him by eight lengths in the Belmont and finished second in the Kentucky Derby, Preakness and Breeders' Cup Classic. Both horses were later voted into the American Hall of Fame.
After his retirement from racing, Sunday Silence attracted little support by breeders in the United States and was exported to Japan. Sunday Silence was Leading Sire in Japan on thirteen occasions, surpassing the previous record of ten titles by Northern Taste. Although the relatively insular nature of Japanese racing at the time meant that Sunday Silence's success was initially restricted to his home territory, his descendants have since gone on in recent years to win major races in Australia, France, the United Kingdom, Hong Kong, the United States and Dubai.
In the Blood-Horse magazine List of the Top 100 U.S. Racehorses of the 20th Century, Sunday Silence is ranked #31.