Nicole Kidman made headlines when she and her husband Keith Urban welcomed their daughter, Sunday Rose, to the world in July, and now Kidman's revealing the details on how she thinks she got pregnant!

The Oscar winning actress tells The Australian Women's Weekly that she believes she conceived last year after swimming in "fertility waters" in the Aussie Outback during production of her epic romance 'Australia,' says the Associated Press.

Kidman, 41, says she was one of seven women who became pregnant after a swim in the waters.

"I never thought that I would get pregnant and give birth to a child, but it happened on this movie," Kidman told the magazine in its 75th anniversary edition.

She went on to say, "There is something up there in the Kununurra water because we all went swimming in the waterfalls, so we can call it the fertility waters now."

In the interview, Kidman calls her labor and her baby "very good."

'Australia' is due for release on Nov. 26.