I didn't find out she was an Aussie till a few months ago...
(Like most Australian actors and actresses who are successful in the US, she did a really good job of concealing that unpleasant sounding Australian nasal twang; sort of cockney, but less posh... )
Another actress who did a really good job of concealing the fact that she was from "down under" (Well, not Australian exactly... New Zealand actually...but that's pretty much the same thing, right? )
Russell Crowe.
Hugh Jackman.
Nicole Kidman
Mad Max Gibson
Portia de Rossi
The late Heath Ledger
“If you trust in yourself, and believe in your dreams, and follow your star. . . you'll still get beaten by people who spent their time working hard and learning things and weren't so lazy.”
Another funny twist to Gibson's accent history was his performance as Fletcher Christian in Bounty...
There you had an Australian actor who had suppressed his native accent, and learned how to speak "American" with no accent, then turning around and doing a role with a phony British accent....