Keith Urban reportedly found his marriage to Nicole Kidman “unbearable” after quietly falling out of love years ago, a source close to the country star has said.

Reps for the Aussie A-listers confirmed their separation in September before a "blindsided" Kidman filed for divorce days later , citing “irreconcilable differences”.

Urban and Kidman, both 58, married on the grounds of St Patrick's Estate in Manly, Sydney back in 2006 in one of the highest profile celebrity weddings of the decade.

Within months Urban checked himself into rehab for drug and alcohol addiction and Nicole later admitted they “didn't really know each other” on their wedding day.

The couple share biological daughters Sunday Rose, 17, and Faith Margaret, 14, while Nicole has two adult adopted children from her fir

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