O is the debut studio album by Irish musician Damien Rice, originally released on 1 February 2002, in Ireland and in the United Kingdom. The album is dedicated to Rice's friend Mic Christopher, a musician who died of a head injury shortly before the album's release at the end of 2001.

Damien George Rice is an Irish musician, singer and songwriter. He began his career as a member of the 1990s rock group Juniper, who were signed to Polygram Records in 1997. The band enjoyed moderate success in Ireland with two released singles, "The World is Dead" and "Weatherman". After leaving the band in 1998, Rice worked as a farmer in Tuscany and busked throughout Europe before returning to Ireland in 2001 and beginning a solo career. The rest of Juniper went on to perform under the name Bell X1.