Nicole Kidman

The Australian actress, 52, made a brief appearance at a pre-Golden Globes event in Los Angeles on Saturday (US time), looking visibly upset.

Kidman's representative told Us Magazine that the couple are "keeping a close eye" on their rural property, which is "under threat" from the NSW wildfires. 

The Oscar winner refused red carpet interviews, saying she was "so distracted".

"I'm so sorry. I'm so distracted right now with everything that's happening in Australia," she apologised, according to attendees. 

The star told a Cannes press conference she likes to make "bold" choices, as if she were at the start of her career.

Kidman said while she doesn't have to work, she does so because of her passion for cinema.

The star of The Killing of the Sacred Deer, in competition at Cannes, said her young children will be banned from seeing the dark psychological thriller.

Kidman has two grown-up children from her marriage to Tom Cruise and two younger daughters with her current husband singer Keith Urban.

Australian radio presenter Kyle Sandilands said to the actress: "I told everyone you were clapping like that because you had the rings on and you didn't want to damage the rings."

"You are so right Kyle," she replied.

"It was really difficult because I had a huge ring on which was not my own, but was absolutely gorgeous and I was terrified of damaging it."

The new photos were shot by German photographer Peter Lindbergh, who's often credited with the creation of the supermodel. Each actress was shot in black and white, wearing minimal makeup -- a Lindbergh signature.

His aim was to "capture sensitivity and emotion, laying bare the souls of the women in the images, rendering them more naked than a nude," he said at the international press launch in Paris.

Kidman adopted two children with ex-husband Tom Cruise and has two biological children with husband Keith Urban. She told CNN that her desire to have a family stemmed from her own "maternal instincts," which have been a "driving force" in her life since she was a young girl.

"I think because I've experienced motherhood in so many different ways," she said. "I've experienced adoption, birthing a child and I've experienced surrogacy. I'm like when it comes to it, I just wanna be a mama."

Isabella Cruise, 22, tied the knot with British IT consultant Max Parker in a secret ceremony at London's Dorchester Hotel on September 18, and neither Tom, nor Bella's mother - Nicole Kidman - were present.

However, according to TMZ, no parents from either side attended as the couple just wanted a small wedding with a few friends and Tom was happy to pay for the nuptials and party at the Dorchester.