Sandy Denny (6 January 1947 – 21 April 1978), born Alexandra Elene Maclean Denny, was an English singer and songwriter, perhaps best known as the lead singer for the folk rock band Fairport Convention. She has been described by Allmusic's Richie Unterberger as "the pre-eminent British folk rock singer".
After briefly working with British folk band The Strawbs, Denny joined Fairport Convention in 1968, remaining with that band until the end of 1969. She formed the short-lived band Fotheringay in 1970, releasing one album with them (another unreleased album would surface some three decades later), before focusing on a solo career. Between 1971 and 1977, Denny released four solo albums: The North Star Grassman and the Ravens, Sandy, Like an Old Fashioned Waltz, and Rendezvous. She is also noted as the only guest vocalist on a Led Zeppelin studio album, when she shared a duet with Robert Plant for "The Battle of Evermore" on Led Zeppelin IV (1971).