Nicole Kidman and Keith Urban have a ''system worked out'' to keep their family ''together''.

The 52-year-old actress and her country music star husband both have busy careers, but have a system in place to make sure they can successfully parent their two daughters - 11-year-old Sunday Rose and nine-year-old Margaret Faith.

Speaking to WSJ magazine, Kidman said: ''We have a system worked out to keep the family together.

"When Keith's not touring, it's much easier. He'll be on tour next year, and then I just don't work as much. Literally - it will become imbalanced, and we will change it.

''We don't have the answers but the one thing we do know is that we will not jeopardise us.''

The Bombshell actress said she values the ''love'' of her family over her career, because she says her accomplishments ''don't matter'' if she doesn't have a support system around her.

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''When you get to the top, just remember there's nothing there. The only thing that really matters is love. No matter what your accomplishments are, it's incredibly lonely if you're not surrounded by some form of love.''

Kidman also shares 25-year-old son Conner and 27-year-old daughter Isabella with ex-husband Tom Cruise.

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