Kidman's wedding in preparation?

Nicole Kidman and Keith Urban's New South Wales retreat has been screened off by trees, shadecloth and fences, sparking reports that sister Antonia Kidman is planning on holding her rumoured wedding there.

The journalist and TV presenter, who has four children with ex-husband Angus Hawley, is believed to be marrying finance broker Craig Marran before Christmas.

The Kidman sisters apparently have a very close relationship and Antonia is believed to be waiting for Nicole's return to Australia before tying the knot.

Hawley recently expressed concern over rumours that Antonia was planning to move to Singapore with his children after the wedding.