Keith Urban and Nicole Kidman's marriage has surived nine years despite the pressure of being always in the spotlight. But the couple allegedly managed to find something in common that they love to do-botox.

According to the recent issue of OK! Magazine, Nicole Kidman allegedly introduced Keith Urban to botox and now the "American Idol" judge is hooked.

The magazine added that Keith Urban has admonished Nicole Kidman in the past about her obsession with the cosmetic procedure but his age is getting up there.

"Keith finally started feeling his years, so he decided to try it for himself," the source claimed. "He is getting Radiesse fillers, because he's determined to keep that baby face his female fans love."

Now that Keith Urban and Nicole Kidman are already hooked on botox, there's even competition brewing between the two and the "Grace of Monaco" star has upped the stakes by increasing her dosage up to the point that she could "hardly moves her face."

Their friends are also worried about their botox obsession, according to the magazine, however nobody is saying anything because the issue is "too awkward to bring up."

Meanwhile, Keith Urban has another explanation on why his marriage to Nicole Kidman survived nine years even with their celebrity status and busy schedules.

"It's our priority, you know?" he told Entertainment Tonight. "It's what we love to do more than anything in the world."

ET noted that Keith Urban and Nicole Kidman managed to survive a "summer of breakups" following the divorce announcements of similar high-profile couples like Blake Shelton and Miranda Lambert, as well as Ben Affleck and Jennifer Garner.

Keith Urban and Nicole Kidman have two daughters together, Faith Margaret and Sunday Rose. The "Grace of Monaco" actress also has two children from a previous marriage to Tom Cruise, Isabella Jane and Connor Anthony.