Donald Hugh Walker (born 29 November 1951) is an Australian musician and songwriter who wrote many of the hits for Australian pub rock band Cold Chisel. Walker is considered to be one of Australia's best songwriters. In 2012 he was inducted into the Australian Songwriter's Hall of Fame. He played piano and keyboard with the Cold Chisel from 1973 to 1983, when they disbanded. He has since continued to record and tour, both solo, initially under the name Catfish and as Tex, Don and Charlie, and worked as a songwriter for others. In 2009, he released his first book.