A 21-year-old singer is allegedly threatening the marriage of Keith Urban and Nicole Kidman, but a rep for the "Queen of the Desert" actress slammed the divorce rumors as false.

An article from Star magazine, per Hollywood Life, claimed that Kelsea Ballerini opened up for Keith Urban during his concert in Paso Robles, California on July 21.

Apparently, the 21-year-old singer went on board Nicole Kidman's husband's trailer and spent about 20 minutes inside. Kelsea Ballerini also "couldn't stop smiling when she walked off."

Nicole Kidman heard the report about Keith Urban and Kelsea Ballerini while she was filming in London, the article claimed.

A source alleged, "She was furious. She called Keith as soon as she heard and demanded to know what women he'd been hanging around with in his trailer."

"Nicole kept hammering away until he finally admitted that Kelsea had visited him. Nicole asked what happened, and Keith said they just talked about how Kelsea's set went," the source went on to add.

"Eventually, the American Idol judge assured his wife that the meeting was 'strictly professional, but Nicole is still questioning his judgment,'" the report added.

"It was apparent to everyone that (Kelsea) was totally infatuated with Keith," the source added.

But Nicole Kidman's rep talked to Daily Mail and slammed the divorce reports and the allegation about Keith Urban cheating on the 48-year-old actress with Kelsea Ballerini was pure "rubbish."

Nicole Kidman and Keith Urban have been warding off divorce rumors since before their ninth wedding anniversary in June.

But the actress insisted to Vogue Australia that they are very much happy with their marriage.

"It's unbelievable that we found each other and at that stage in our lives were able to connect in that way and be that open to what the future was going to be," she said. "But we really commit to each other and give to the relationship; our priority is to be together. I don't ever take it for granted."