Nicole Kidman shares surprising secret to 18 year marriage to Keith Urban

Actress Nicole Kidman, 57, and country singer Keith Urban, 57, have a Hollywood marriage that has stood the test of time. The couple, who both hail from Australia, wed in 2006. They share two daughters together: Sunday Rose and Faith. So what has sustained their relationship for nearly two decades? In a new interview with W Magazine, Kidman spilled on how she and Urban have remained strong--and it involves their bathroom.

When asked by the publication if she sings in the shower, she replied: “I do. I also hear Keith singing in the shower, and I’ll hear his new songs forming. We have a double shower."

But she didn't just leave it there. She went on to disclose more about the couple's secret sauce to a long and lasting marriage. "The double-headed shower: key to a successful marriage," she said, before adding: "Separate commodes and a double-headed shower!” (A commode is another term for toilet.)

The actress also told the outlet that her go-to karaoke song is “I'm Not in Love” by 10cc, adding "I don’t mind a little Captain & Tennille either"–which may also be her go-to shower singing tunes.

Kidman has previously opened up about what has made her marriage to Urban last for nearly 20 years. In 2023, she shared that the secret came down to avoiding a common modern-day communication method. During an appearance on the Something To Talk About podcast, Kidman shared, "We never text each other, can you believe that? We started out that way – I was like, 'If you want to get a hold of me, call me…"I wasn't really a texter."

In another interview with Parade, she elaborated on their no-texting agreement. “We just do voice to voice or skin to skin, as we always say. We talk all the time and we FaceTime but we just don’t text because I feel like texting can be misrepresentative at times…I don’t want that between my lover and I,” she said.

The couple's old-school ways have seemingly kept their relationship alive and thriving. "I like being asked out, which he still does," Kidman told PEOPLE in December 2024. "Seven nights ago we went to dinner in New York. We love Japanese food, but I'm open [to everything]. I like not knowing where he’s going to take me. Surprise me, baby!"

Of course, Kidman added that her musician husband has also made her his artistic muse, and inspired her favorite song of his called "Once in a Lifetime". She told the publication, "Keith wrote that for me when we were first getting married."

During Urban's speech for Kidman receiving the 49th AFI Lifetime Achievement Award in June 2024, Urban shared the challenges their love has overcome—which began soon after they said 'I do'. "We got married in June 2006, and barely four months into our marriage, my addictions that I'd done really nothing about blew our marriage to smithereens, and I went into the Betty Ford Center for three months," he shared with the audience. "Four months into a marriage, I'm into rehab for three months, with no idea what was going to happen to us. And if you want to see what love in action really looks like, give that a whirl."

For most couples, it may have been a death sentence—but it brought them closer.

"Nic pushed through every negative voice — I'm sure even some of her own — and she chose love," he said. He went on to added, "That's the thing about Nic: she loves life. I've actually never met anyone who has such a passion for being alive. She knows the importance of expressing feelings as well. I wasn't raised like this at all, so our girls are very lucky to be learning from you, baby. I'm learning, too."