Be My Guest (12 April 1974 – 19 February 2004) was an American-bred, Irish-trained Thoroughbred racehorse and champion sire in Britain. He was bred in Kentucky by Walter Haefner, a Swiss businessman and owner of Moyglare Stud Farm in Ireland. Sired by the great Northern Dancer, his dam was What a Treat, the 1965 American Champion Three-Year-Old Filly and a daughter of the 1947 2,000 Guineas Stakes winner, Tudor Minstrel.