Guess what other Australian actors weren't born in Australia?
Nicole Kidman, born in Hawaii, moved to Washington D.C., then to Australia when she was about three. Naomi Watts, born in England, raised in Australia. Russell Crowe, born in New Zealand, lived in Australia since he was a small child. Guy Pearce, born in England (nine years and 364 days after me, BTW), moved to Australia when he was three. Isla Fisher was born in Oman.
Seems like Heath is one of the few big Australian stars who was actually born in Australia.
Well, him and Cate Blanchett, Hugh Jackman, Toni Collette, Geoffrey Rush, Abbie Cornish and I'm sure a few others.