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.