Nicole Kidman knows her husband needs space when he Googles cars.

Nicole Kidman and Keith Urban

Nicole Kidman and Keith Urban

The 53-year-old actress - who has daughters Sunday, 12, and Faith, 10, with Keith Urban - has a house full of girls but knows the 52-year-old country singer needs to get away from the chaos when he starts looking at motors online.

She told Marie Claire: “We’re definitely female-heavy! But as the girls say, ‘The dog’s a boy!’ Keith and [the dog] Julian. At times, he just needs to escape with his guitar. Sometimes I’ll find him in his closet playing guitar. That’s when I know we really need to give him space.

“Oh, and he googles cars. I’ll know when he’s stressed ’cause he’s Googling cars.

"I couldn’t care less what car I’m driving; you can pick me up in any old thing. But Keith and Faith love cars.”

The ‘Big Little Lies’ star recently returned to Australia with her family to film her upcoming television show ‘Nine Perfect Strangers’.

But she insists she has a “simple life” despite everyone around her thinking her life is chaotic.

Nicole explained: “I’ve got an incredible life now, though. I actually have a very simple life, strangely enough. Everyone thinks it must be so complicated, but it’s not. My creative life is off the charts, but my actual life with my husband and two daughters is quite simple.”

What’s more, Nicole revealed that she has a fear of public speaking despite giving a powerful speech about domestic violence at the 2017 Emmy Awards.

She spilled: “I’m deeply introverted. Not when I’m with a small number of people, but I’m not comfortable in crowds. I have trouble public speaking.

“When I do go out, I end up having the best time. There’s a tip: push me, make me go out! In my 20s, I was far more active. I was just talking to your fashion team, and they said, ‘You’ve been photographed by everyone’. And I said, ‘Yeah, I used to go to Paris and be with John Galliano and Karl Lagerfeld and lead an unbelievably glamorous lifestyle’. And how wonderful to have all those different phases.”