Gustav Hansen is a Danish professional poker player from Copenhagen, Denmark who has lived in Monaco since 2003. In his poker career, Hansen has won three World Poker Tour open titles, one WSOP bracelet and the 2007 Aussie Millions main event, and was the season one winner of the Poker Superstars Invitational Tournament. Before turning to playing poker professionally in 1997, Hansen was already a world class backgammon player and a youth tennis champion.

The Australian Poker Championship, commonly known as Aussie Millions, is a series of poker tournaments held at the Crown Casino, in Melbourne, Australia. The Main Event of the series is the Southern Hemisphere's richest poker tournament with a prize pool in excess of A$7 million.