Peaceful (foaled 22 January 2017) is an Irish Thoroughbred racehorse. She showed some promise in three starts as a juvenile in 2019 when she won one minor race and was narrowly beaten in the Montrose Stakes. On her first run as a three-year-old she won the Irish 1,000 Guineas. She later finished third in the Prix de Diane and second in the Matron Stakes.