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Sonic Lady (15 February 1983 – February 1996) was an American-bred, British-trained racehorse and broodmare. A temperamental filly who was often difficult to ride, she was a specialist miler who won seven Group races. After winning her only race as a two-year-old, she won the Nell Gwyn Stakes in April 1986, but was beaten into third place when favourite for the 1000 Guineas. She then won her next five races: the Irish 1,000 Guineas, Coronation Stakes, Child Stakes, Sussex Stakes and Prix du Moulin and was rated the best filly of her generation in Europe. She stayed in training as a four-year-old in 1987 and won a second Child Stakes. She was twice the beaten favourite in the Breeders' Cup Mile. Retired to stud at the end of 1987, she had some success as a broodmare.