The Marvelettes was an American girl group that achieved popularity in the early- to mid-1960s. They consisted of schoolmates Gladys Horton, Katherine Anderson, Georgeanna Tillman, Juanita Cowart (now Cowart Motley), and Georgia Dobbins, who was replaced by Wanda Young prior to the group signing their first deal. They were the first successful act of Motown Records after the Miracles and its first significantly successful female group after the release of the 1961 number-one single, "Please Mr. Postman", one of the first number-one singles recorded by an all-female vocal group and the first by a Motown recording act.