The actress joined the Urbans at his rural retreat on Christmas Eve, according to showbiz magazine In Touch.
The Moulin Rouge star was spotted strolling with Urban and his mother, Marienne, in Percy Warner Park in Nashville late on Christmas Day.
Although locals reported seeing the loved-up pair holding hands, the couple still hasn't gone public with the romance.
It's the second successive holiday Kidman has spent with Urban and his family—she also joined them for Thanksgiving at the end of November, inviting her own parents, Janelle and Antony, to join her.
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