Margo Guryan (born September 20, 1937) is an American songwriter, singer, musician and lyricist. As a songwriter, her work was first recorded in 1958, although it was for her 1960s song "Sunday Mornin'", a hit for both Spanky and Our Gang and Oliver, that she is perhaps best known. Her songs have also been recorded by Cass Elliot, Glen Campbell and Astrud Gilberto, among others.