Keith Urban and Nicole Kidman celebrated a full dozen years of marriage on Monday (June 25), and Urban was not about to let that milestone fall by the wayside. The singer posted a sweet candid shot on his social media showing a private moment between the two to commemorate their special day.

In the photo, Urban appears to be hammering away at a tune on the piano, while his wife grooves behind him with an adorable look of pure bliss on her face.

"12 years of celestial synergized soul dancing," Urban captioned the snap. "Happy anniversary Babygirl!!! I love you SO much."

See Keith + Nicole's Sweetest Pictures Through the Years

While the couple have now been together well over a decade, they are admittedly in the unique position of both balancing high-profile showbiz careers, which comes with a unique set of challenges. Urban admits that he and Kidman are continuously working on their marriage, and are careful about making sure they attempt to adjust things as soon as they go awry.

"I'm a work in progress," he told several media outlets backstage at 2018 CMA Music Festival (quote via the Boot). "We're just like any married couple, trying to figure out what works and what doesn't work. Trying to balance work and family life is challenging for everyone, and it's no different for us."

Watch Keith Urban and Nicole Kidman Sing Together: