Gregory Donald "Greg" Williams (born 30 September 1963) is a former Australian rules footballer who represented Geelong, the Sydney Swans and Carlton in the Australian Football League (AFL) during the 1980s and 1990s.
A midfielder, he is a dual Brownlow Medal winner and at his peak was the then highest-paid player in the history of the sport.
He was also a very controversial player throughout his career, and was involved in a variety of scandals throughout the 1990s.