Gillan was in a relationship with Zoe Dean from 1969 to 1978. They had known each other since his time in Episode Six. In 1984, Gillan married his girlfriend Bron, to whom he had dedicated "Keep It Warm" from Black Sabbath's 1983 album "Born Again". They have twice since renewed their marriage vows. Their daughter Grace Gillan is also working as a singer for the band Papa LeGal. Gillan lives near Lyme Regis, Dorset and has a home in southern Portugal.