Duncan Mackay (born 2 July 1950) is a British composer, singer, arranger, and keyboard player. He was born in Leeds, Yorkshire, England.
In 1985 MacKay met Debbie Raymond, daughter of 'porn king' Paul Raymond, at a party. The couple went on to have a daughter, Fawn, the eldest of her two children.
In 2004 Duncan completed an album with South African singer/composer Greg McEwan-Kocovaos called "The First Time". This "indie" album received its first airplay on the infamous Radio Caroline by veteran UK DJ Martin Turner and was reviewed by the official 10cc fan site.