The Paddington star has admitted youngest kids Sunday Rose, six, and Faith Margaret, four, are confused when people approach the family in public and request photographs of their famous mum and dad, country singer Keith Urban.
"Our kids don't understand what we do so for them, it's just like, 'Why is this stranger taking a photo of you?' and it's very discombobulating for them," she told the Today show.
"They find it odd. They look and get possessive of us. She's my mummy!"
Nicole and Keith, who previously served as an American Idol judge, prefer to shun the limelight, and instead of living in Los Angeles, set up home in Nashville, Tennessee.
"We have a very easy, warm, peaceful life and that's something I always wanted. I was heading towards it and didn't know how to find it but I've found it now."
Nicole recently praised Keith for the love and support he provided her with while she dealt with the sudden passing of her father.
"He has been so good to me for nine years. When you have your partner who just literally carries you through a tough time ... he's been amazing to me."
Nicole was previously married to Hollywood superstar Tom Cruise, the father of her eldest children Connor, 19, and Isabella, 22.
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