United Kingdom, June 22 -- Nicole Kidman has surprisingly paid tribute to former husband Keith Urban on Father's Day.

Sharing rare family photographs of the country music star with their daughters and honouring the fathers who have shaped her life, the Oscar-winning actress, 59, marked the occasion on Instagram on Sunday (22.06.26) with a series of black-and-white photographs, including one showing Keith carrying daughters Sunday Rose and Faith Margaret, on his back when they were younger.

The post comes months after Nicole and Keith finalised their divorce in January, following the end of their 19-year marriage.

Despite the separation, Nicole's message publicly acknowledged Keith's role as a father to their children.

The actress is a...