Nicole Kidman reveals the secret to her successful 18-year marriage with Keith Urban.

Nicole Kidman claims that the secret to her 18-year marriage with Keith Urban lies in their bathroom, particularly their shower.

Her country music star husband also sings in the shower, as the 57-year-old actress confessed.

W Magazine reported that Kidman stated, "I can hear Keith singing in the shower, and his new songs are taking shape."

"A double-headed shower is crucial for a successful marriage, along with separate commodes."

The Hollywood actress previously shared another key factor in their relationship.

Since the beginning, the couple has only communicated through voice calls, as Kidman revealed in Parade magazine. "We don't text," she said at the time. "We call. We've done this since the very beginning. The reason it started at the beginning was because I didn’t know how to text, and it just kind of worked for us. So, now we don't."

"We communicate through voice to voice or skin to skin, as we always say. We frequently talk and FaceTime, but we don't text because I believe it can be misrepresentative at times," she stated.

Their secret to a lasting marriage is simple: "Not keeping secrets," Kidman stated.

In 2023, the country music star revealed to Planet Chronicle Digital a secret to maintaining a strong marriage.

Urban emphasized the importance of family before the ACM Awards.

""Although it's not always perfectly balanced, we can always bring it back into balance," he stated."

Kidman and Urban share two daughters: Sunday Rose and Faith Margaret.

In addition to starring in "Big Little Lies," Tom Cruise's adopted children, Connor and Isabella, are also his.

Those children's participation in Scientology, alongside Cruise, has strained Kidman's relationship with them, according to reports.

While working on the 1989 film "Days of Thunder," Kidman and Cruise met and later married in 1990. They adopted Isabella in 1992 and Connor in 1995. During their divorce in 2001, they agreed on joint custody.