Black Tie Affair (April 1, 1986 – July 1, 2010) was a thoroughbred racehorse. Bred by American businessman Stephen D. Peskoff, he was out of the mare Hat Tab Girl and sired by Miswaki, who also sired Prix de l'Arc de Triomphe winner Urban Sea and who was a two-time Leading broodmare sire in Great Britain & Ireland.