They were once known for their passionate appearances on Hollywood’s red carpets, but those close to Nicole Kidman and her husband Keith Urban reveal that their relationship had lost its spark in recent months.

Following reports by the Daily Mail on Monday that actress Kidman, 58, and country singer Urban, 57, have parted ways after 19 years of marriage and raising two kids, insiders point to a lack of intimacy and hectic schedules as the primary reasons for the separation.

‘Keith never sees Nicole, either she is filming or he is on tour,’ one source tells the Daily Mail.

“There was a lot of love between them, and divorce isn’t certain. Having been together for so long, there’s a chance they might reconcile, but as things stand, they’re not currently a couple.”

It is understood that Urban was the one to instigate the split, with his ‘unhappiness’ in the marriage prompting him to ‘call her out’. Kidman was ‘blindsided’ by her husband’s intervention, the source said.

Ubran’s main complaint appears to have been a growing coldness between the couple.

‘The intimacy isn’t there, they are just going through the motions [of being married]. If this separation gets them back together, that would be amazing, but Keith had to call her out that he isn’t happy,’ the source continued.

‘She was blindsided, but we shall see how things go during the holiday season and his upcoming birthday [next month]. They have some work to do.’

The Daily Mail reached out to representatives for the pair who have been unavailable for comment.

Kidman and Urban share daughters Sunday Rose, 17, and Faith Margaret, 14.

Another source close to the Australian actress says that, since the split, she has been taking care of the children and holding the family together through this difficult time while Urban has been away.

The country star has been on his High and Alive World Tour since May. He is due to perform in Hershey, Pennsylvania on Thursday.

Kidman and the children, meanwhile, are staying in Nashville, where the couple own a $4million compound. TMZ reported Monday that Urban has ‘acquired his own residence in Nashville and has moved out of their family home.’

Over the summer, the actress decamped to England while she filmed the sequel to her 1998 movie Practical Magic. She was paying a reported £65,000 ($87,000) each month to rent a luxurious Hampstead mansion once owned by pop star Boy George.

While the London move was for work, it certainly raised eyebrows back in Kidman’s native Australia.

‘[Kidman and Urban] do make an effort to speak every day when they’re apart, but it is shocking how much time they’ve spent apart since Nicole’s mother died last September,’ an insider told local magazine Woman’s Day earlier this month. ‘It’s like they both went their separate ways.’

Back in July, Urban dropped a hint that all was not well between the pair when he dramatically hung up during a phone interview with a radio station after a crude question about Kidman’s raunchy recent scenes, such as in her movies Babygirl and A Family Affair.

For her part, and while promoting her Netflix series The Perfect Couple in September last year, Kidman admitted there was no such thing as a ‘perfect’ marriage.

‘There’s no perfect anything,’ she said, ‘anything that’s presented as perfect… forget it.’

Kidman was previously married to actor Tom Cruise for 11 years from 1990 to 2001. They adopted two children together.