Sun Kil Moon is an American folk rock act from San Francisco, California, founded in 2002. Initially a continuation of the defunct indie rock band Red House Painters, Sun Kil Moon is now the primary recording moniker of vocalist and guitarist Mark Kozelek. The project is named after the Korean super flyweight boxer Sung-Kil Moon.

Red House Painters were an American rock band formed in Atlanta, Georgia in 1988, before relocating to San Francisco, California. They were one of the most prominent acts associated with the slowcore/sadcore subgenre. The band was formed by primary songwriter Mark Kozelek and drummer Anthony Koutsos. Together, the pair moved to San Francisco, California, where they were joined by bassist Jerry Vessel. Guitarists Gorden Mack and Phil Carney both performed with the band during separate six-year tenures.