The Oscar-winning actress exchanged vows with the Grammy award-winning country music star in a tearful, candlelit ceremony overlooking the Pacific late Sunday.
Kidman, 39, appeared relaxed in a black and white dress topped with a black cardigan, while the 38-year-old country music superstar wore jeans and a light blue T-shirt.
The pair were spotted boarding Kidman's private jet on Monday evening, prompting frenzied media speculation about where they might spend their honeymoon.
Kidman and Urban have been tight-lipped about their immediate post-wedding plans, but local media have widely tipped either Fiji or Tahiti as the most likely destinations, the AP reports.
The ultra-exclusive island resort is a preferred destination for superstars seeking to avoid the prying eyes of paparazzi and celebrity gawkers. It is also where Rolling Stones rocker Keith Richards injured his head after reportedly falling out of a palm tree in April.
However, Fiji was once a favored vacation spot for Kidman and her former husband, Tom Cruise, prompting speculation that she and Urban will opt instead for a luxury resort on Tahiti's Bora Bora island.
Kidman, who was born in Hawaii to Australian parents, exchanged vows with Urban, who was born in New Zealand but raised in rural Queensland state, by the light of around 1,000 candles at a small chapel overlooking Sydney's iconic Manly beach.
The beaming bride wore a flowing white Balenciaga gown and pearl drop earrings. Her cream Rolls-Royce limousine drove from her waterfront mansion across the iconic Sydney Harbor Bridge, through streets lined with cheering fans.
Kidman, accompanied by her father, Antony, smiled and waved to well-wishers outside the Gothic-style St. Patrick's College building, which was dramatically floodlit for the twilight ceremony.
Urban wore a black suit with a white rose in his lapel matching a bouquet clutched by Kidman.
The traditional Roman Catholic ceremony was private, amid intense public interest and speculation about the details.
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