Magnificent Star (foaled 5 March 1988) was an American-bred, British-trained Thoroughbred racehorse and broodmare best known for her win in the 1991 Yorkshire Oaks. She was unraced as a two-year-old and was beaten on her first two starts of 1991 before winning the Listed Fillies' Trial Stakes. She then finished fifth in the Epsom Oaks and second in the Glorious Stakes before recording an upset victory over a strong field in the Yorkshire Oaks. She never won again and was retired from racing at the end of 1992. She had modest success as a dam of winners.