Proud Spell (foaled May 13, 2005) is an American Thoroughbred racehorse and broodmare. As a two-year-old in 2007 she was rated one of the best juvenile fillies in the United States, winning her first three races including the Matron Stakes before finishing second in the Breeders' Cup Juvenile Fillies. She was even more successful in her second season, winning four races including the Fair Grounds Oaks, Kentucky Oaks, Delaware Oaks and Alabama Stakes.