Deceit (foaled May 3, 1968, in Kentucky) was an American Thoroughbred racemare bred by Leslie Combs II and Charles H. Wacker III, and owned by E. P. Taylor's Windfields Farm. Deceit was sired by Prince John, a four-time leading broodmare sire in North America, and out of the mare Double Agent, a daughter of Double Jay who was the 1946 American Champion Two-Year-Old Colt and also a four-time leading broodmare sire in North America.