The 46-year-old actress, who was born on the Hawaiian island of Oahu, revealed recently to InStyle that her parents actually gave her the Hawaiian name of Hokulani after birth, a name that Urban often calls his wife at home.
"My mum called me Hokulani. It means heavenly star," the Oscar winner explained to the mag. "That's something no one really knows. Well, Keith knows it. He calls me Hokulani sometimes."
When she was growing up in Australia after her family returned from Hawaii, Kidman admitted, "I used to tell the kids at school that I was born right on Waikiki Beach in Honolulu. I was actually delivered in a hospital—but it sounded good and they believed me.''
These days, Kidman says she hasn't lost touch with her childhood memories of spending time outdoors around nature.
"I'm very country at heart," she said. "I have a real desire to be outdoors, a desire for simplicity—a slightly slower, relaxed approach to life. A community, not a big-city feel. That's what I grew up with, and it's what I prefer."