Nicole & Keith НОLIDAY ENDS IN FIGHT!

IT'S STRAIGHT BACK TO WORK FOR THE ALWAYS-ON COUPLE

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Nicole Kidman and Keith Urban couldn't have asked for a better summer holiday Down Under.

Not only did they spend precious time with family, including the actress' 81-year-old mum Janelle, but they partied with celebrity friends, caught Elton John's concert in Newcastle and even had a short romantic break in Tasmania.

But all good things must come to an end - something they were quickly reminded of when it was time to buckle up their kids and jet off back to work.

Nicole and Keith, both 55, were spotted at the airport in Los Angeles looking like their emotions were getting the better of them.

"Nic and Keith had such an amazing time in Australia and neither of them could bear to leave," says a source.