Sleepytime (foaled 20 February 1994) is an Irish-bred, British-trained Thoroughbred racehorse. In a racing career which lasted from September 1996 to April 1998 she ran six times and won two races. In two races as a two-year-old she won one race, and finished third in the Group One Fillies' Mile at Ascot. On her three-year-old debut she was beaten in the Fred Darling Stakes at Newbury but then won the Classic 1000 Guineas at Newmarket Racecourse.