Nicole Kidman took a break from filming new movie AUSTRALIA on Sunday night (15Jul07) to host sister ANTONIA's 37th birthday party. The actress, joined by husband Keith Urban, booked Sydney's North Bondi Italian Restaurant for the family gathering. The couple turned up with Nicole's mother Janelle and went out of their way to help Antonia celebrate her fist birthday since splitting from husband Angus Hawley three months ago. Actress Nicole used her star power to book the entire restaurant, which doesn't normally take bookings at all, to celebrate her sister's big day. It was payback for Antonia, who organised her big sister's 40th celebrations last month (Jun07).