Clifford 'Cliff' Williams (born 14 December 1949) is a British musician who has been a member of the Australian hard rock band AC/DC as their bassist and backing vocalist since mid-1977. He had started his professional music career in 1967 and was previously in the British groups Home and Bandit. His first studio album with AC/DC was Powerage in 1978. The band, including Williams, was inducted into the American Rock and Roll Hall of Fame in 2003.