Our mystery cleavage today belongs to a gorgeous 30-year-old Australian actress.

Originally from Lochinvar, New South Wales, this beautiful blonde grew up one of five children on a 70-acre farm, and was interested in independent and foreign films at an early age. By the age of 13, she was already modeling. In 1999 she had received an award from the Australian Film Institute for her role in ABC's 'Wildside,' which led to her first feature film, 'The Monkey's Mask.'

Since then she's gone on to star opposite such big names as Heath Ledger, Bradley Cooper, and Robert De Niro.  From where we're standing, her career looks pretty 'Limitless.' Any guesses?