Australian showbiz royalty Nicole Kidman and Keith Urban have separated after almost 20 years of marriage, according to multiple media reports.

"Sometimes relationships just run their course," an unnamed source close to the couple told the New York Post, confirming the split.

The Oscar winner and country music hit-maker have been living apart since June, according to entertainment website TMZ.

In June, Kidman, 58, shared a photo of herself cuddled up to Urban on Instagram to celebrate their wedding anniversary.

Four-time Grammy winner Urban, 57, has moved out of the couple's Nashville home, according to the reports, amid claims Kidman is desperate to save the relationship.

"She didn't want this," another unnamed source told People magazine.

"She has been fighting to save the marriage

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