Grant William Millington (born 1 November 1986) is an Australian former professional rugby league footballer, who played as a prop, second-row or loose forward for the Castleford Tigers (Heritage № 925) in the Super League. He previously played in the NRL for the Cronulla-Sutherland Sharks between 2008 and 2010, and for the Canterbury-Bankstown Bulldogs in 2011.