Marcel Boussac
Sulk was a thoroughbred racehorse. She was born in 1999 and won two races in 2001, including France's prestigious Prix Marcel Boussac, and placed as a three-year-old in the Nassau Stakes, Yorkshire Oaks, and the Prix Royal-Oak. She was trained by John Gosden, and after finishing her racing career was a broodmare until she died in 2009 of colic.