Clifford Williams (born 14 December 1949) is an English bassist, best known for his membership in the Australian hard rock band AC/DC since June 1977 and was inducted into the Rock and Roll Hall of Fame in 2003 along with the other members of AC/DC. He moved with his family to Liverpool when he was nine, where he spent the first two working years of his life as an engineer before joining his first band, Home. Like his bandmate Brian Johnson, he now lives in southwest Florida. He is the father of model/actress, Erin Lucas.
His signature guitar is the Fender Precision Bass.