Baker was a former champion sportsman who competed at state level in surfing and water polo. He began acting on Australian television during the late 1980s using the name Simon Baker Denny. After appearing in the successful series E Street, Home and Away and Heartbreak High, Baker relocated to the USA. He was occasionally known by his stepfather's surname (i.e. as Simon Baker-Denny or Simon Denny).

He was cast in a small but important part as a young would-be actor in L.A. Confidential, which led to further opportunities in supporting roles in films. He played the male lead in the television series The Guardian for three seasons beginning in 2001, and also appeared in The Affair of the Necklace in 2001. He played an altruistic hero in George Romero's Land of the dead.

He is married to the Australian actress Rebecca Rigg, and they have 3 children.

Simon and his family resided until recently in Malibu, California, but have since moved back to Sydney, New South Wales, Australia.

--Wikipedia