Brett Ratten (born 11 July 1971) is an Australian rules football coach and former player in the Australian Football League (AFL). He played 255 games for the Carlton Football Club between 1990 and 2003, including the club's 1995 premiership. He then served as Carlton's senior coach from 2007 to 2012. After a seven-year stint as an assistant coach with Hawthorn and St Kilda, in 2019 he was appointed as St Kilda's senior coach, a role he held until his sacking at the end of the 2022 AFL season.