The actress who is due to give birth in June is currently in Australia.
Nicole is filming in her hometown of Sydney and her pregnancy is just beginning to show.
The baby will be the 40-year-old's first child with husband Keith Urban, 40, and she cannot contain her excitement.
'I just want to have this child safely and happily and then we will see,' Nicole reveals on her website.
'Keith and I would really love to have a big family. But I'm so happy at the moment, I couldn't ask for anything more.'
But Nicole remains tight-lipped about the sex of the child.
'It's a secret,' she says.
Nicole, who suffered two miscarriages while married to Tom Cruise, has 2 adopted children , Isabella, 15, and Connor, 13.
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