Born on this day in 1949, Cliff Williams, the English musician and member of AC/DC as their bassist and backing vocalist from 1977 to 2016 and again in 2020, turns 74. Cliff was inducted into the Rock and Roll Hall of Fame with AC/DC in 2003. In 2016, Williams announced his retirement from the music industry after AC/DC's "Rock or Bust"World Tour. In his honor, watch Cliff talking about playing bass in the Thunder from Down Under!