The 47-year-old actress is very happy with husband Keith Urban and their daughters Sunday, six, and four-year-old Faith and admits she didn't realise how to achieve domestic bliss until she got there.
Nicole - who also has adopted kids Isabella, 22, and Connor, 19, with ex-husband Tom Cruise - said: "We have a very easy, warm, peaceful life.
"I think that's something that I always wanted and I was heading towards and I didn't know how to find it -- and I found it now. I laugh a lot more now, I'm happier."
Nicole and Keith refuse to pose for pictures with fans when they are out as a family because their children don't understand why they are being approached.
The actress told 'Today Show' host Matt Lauer: "Our kids don't understand what we do, so for them, it's just, 'Why is this stranger taking a photo of you?' And it's very discombobulating for them."
Despite her years of Hollywood success, the 'Paddington' star is still stunned by how far she has come since she was a child dreaming of being an actress.
She said: "It's been an extraordinary journey, my life, from a little girl who grew up in Sydney and sort of watched the Academy Awards on TV when I was just seven years old --to have actually come that whole distance is extraordinary."