The 46 year old recently said that Urban showers her with love notes when they're apart in order to keep their relationship exciting, reports contactmusic.com.
When asked what love means to her, the actress said: "It's the be-all and end-all. It's your salvation. It's the thing that keeps you all right, and hopefully, if you're on the right path, it envelops you and keeps you safe. If you find it, you don't let it go."
When Kidman isn't filming, she enjoys accompanying the American Idol judge on tour with daughters Sunday Rose, five, and Faith Margaret, three, because she gets to indulge on fast food. (Also read:Nicole plays Grace Kelly onscreen)
"Keith and I eat at Wendy's. You've got to remember, I'm with a musician on a tour bus. We do drive-throughs!" she said.