Keith Urban has told friends his split from Nicole Kidman had been a "long time coming" – but those close to the actress tell RadarOnline.com she was left "blindsided" and struggling to accept the end of their 19-year marriage .

The couple, who used to be one of Hollywood's most enduring pairings, confirmed their separation in late September. Article continues below advertisement

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Urban, 57, is understood to have moved out of their Nashville home , which he shared with Kidman, 58, and their daughters Sunday, 17, and Faith, 14.

A source close to the pair said: "Some things just end naturally." Article continue

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