The AFL has announced Sydney Swans forwards coach Steve Johnson as the 2019 premiership cup ambassador.

Johnson, who joined Sydney's coaching panel ahead of season 2018, enjoyed an illustrious 293-game career with the Geelong Cats and GWS between 2002 and 2017.

One of the best forwards of his generation, he held the premiership cup aloft in 2007, 2009 and 2011.

Johnson's role as premiership club ambassador will see him travel with the silverware to all key events during Grand Final week.