Fleet (1964 – after 1979), known in the United States as Fleet II, was an Irish-bred, British-trained Thoroughbred racehorse and broodmare who won the classic 1000 Guineas in 1967. In a racing career lasting from June 1966 until July 1967, the filly contested nine races (including one occasion on which she refused to start) and won five times. As a two-year-old in 1966, Fleet won two of her three races including the Cheveley Park Stakes and was the highest rated filly of her age in Britain. In the following year she won three races over a distance of one mile including the 1000 Guineas and the Coronation Stakes. When tried over longer distances she finished fourth in the Epsom Oaks and Eclipse Stakes. She was retired to stud where she had some success as a broodmare in Britain and the United States.
Fleet was a bay mare bred in County Limerick, Ireland by Peter FitzGerald. Her sire, Immortality, a British-bred half brother to the Whitney Stakes winner Cohoes, was sent to stud without ever having competed in a race. Shortly after siring Fleet he was sold and exported to Argentina. Fleet's dam, Review, was an outstanding broodmare: her other progeny included Pourparler (1000 Guineas), Democratie (Prix de la Forêt) and Display (Cheveley Park Stakes, Coronation Stakes). Review was a difficult and temperamental mare, who was often sent to be covered by Immortality as he was based near FitzGerald's stud.