Washington, June 22 -- Nicole Kidman paid tribute to ex-husband Keith Urban on Father's Day, sharing a heartfelt message and throwback family photographs six months after the former couple finalised their divorce.

The actress honoured the fathers in her life, marking the first Father's Day since she and the country music singer officially ended their marriage in January.

Kidman shared two black-and-white throwback images on her Instagram Stories, including one showing Urban carrying their daughters, Sunday Rose and Faith Margaret, on his back when they were young children.

Across the photos, she wrote, "Happy Father's Day to all the fathers."

Kidman and Urban married in 2006 and share two daughters, Sunday Rose and Faith Margaret.

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