Nicole Kidman and Keith Urban will be far away from each other in the next few months. This will allegedly test their marriage as things will become even harder for the two celebrities.

Sources explained to Star that the "Practical Magic" actress is back in Australia to take care of her ailing mother. She needs her husband most during these times but, he is set to embark on a world tour.

Urban is said to be leaving this summer, and "will be gone for weeks, sometimes more." Accordingly, this means that he will be "long spells apart" from his wife and their children.

The insiders argued, however, that Nicole Kidman understands the situation. She gets that "touring is so demanding," and it is not Keith Urban's fault.

Despite this, though, it does not reportedly make things easier for them. "They will be in different time zones and headspaces," and the distance will be a challenge for them.

It is true that Keith Urban will be touring this summer. Rolling Stone previously reported that the artist will launch "The Speed of Now World Tour" in Florida this June.

Based on the publicized schedule, he will spend the succeeding six months across the United States and Canada. The tour will end on November 5, and Ingrid Andress will open for all the sets.

Even so, this does not confirm that things will be hard for him and his wife, Nicole Kidman. There is no evidence proving that they see the upcoming distance between them as a matter that will test their marriage.

Moreover, the actress even recently revealed their secret to a happy marriage. Kidman told CBS Mornings that she and Urban are a "mix," and they are "very suited for each other," according to MailOnline.

She, also, shared how "incredibly lucky" she is to have met her husband. Furthermore, she described it, as well as the singer, as the "best thing" that has ever happened to her.

Nicole Kidman and Keith Urban received an introduction at the G'Day USA Gala in 2005. A year later, they tied the knot in Australia, and a handful of celebrities were in attendance, according to Us Weekly.

The two celebrities welcomed their first child in 2008, and another in 2011 via surrogate.

Urban and Kidman have since remained happily married, and do not even shy away from sharing to the world how much they love each other. They post photos and updates of their lives, especially relationship milestones, on social media.