Oscar-winner Nicole Kidman and husband Keith Urban celebrated their fourth wedding anniversary last week with a romantic dinner at a Nashville restaurant, according to reports.

The pair are said to have sat in a quiet corner at Flyte, an establishment that is a favourite of other celebrities including Shania Twain, Gwyneth Paltrow and Taylor Swift.

‘[Nicole] looked stunning, very understated in a sleeveless dress and sandals,’ People.com reports an observer saying.

‘They were smiling and holding hands across the table. You could tell they were so in love.’

After dining, the couple are said to have spent time talking to the staff, who said the famous duo were ‘a delight’.

Kidman and Ubran wed in Sydney, Australia in 2006, and welcomed daughter Sunday Rose in 2008.