Gay Mecene (16 May 1975 – 24 December 1998) was an American-bred, French-trained Thoroughbred racehorse and sire. After winning his only race as a two-year-old in 1977, he developed into one of the best French-trained colts of his generation when he won the Prix de Guiche, Prix Eugène Adam and Prix Niel. Although he won only once in six races in the following year he showed arguably his best form when easily beating a top-class field in the Grand Prix de Saint-Cloud and running second to Troy in the King George VI and Queen Elizabeth Stakes. He later stood as a breeding stallion in France and Japan and had some success as a sire of winners.