But in a recent interview with The Hollywood Reporter the 45-year-old actress touched briefly on the subject.

A new expose on Scientology, Going Clear by Pulitzer Prize winner Lawrence Wright, claims the religion was the main cause of the breakdown of her marriage to Tom, and is heavily referred to throughout.

“I’ll bet it is," Nicole said when this was pointed out to her by a reporter.

While Nicole no longer has any association with the religion, her two older children, Isabella, 20, and Connor, 17, are devoted to it.

“I’ve chosen not to speak publicly about Scientology,” the actress says. “I have two children who are Scientologists and I utterly respect their beliefs.”

Nicole will neither confirm nor deny the religion forced Tom to turn against her, saying she is more interested in her life today with her second husband Keith Urban and their daughters Sunday Rose and Faith Margaret at their home in Nashville, Tennessee.

“It’s such an easy lifestyle. And it’s more diverse than you’d expect. There’s so much great music,” she said.

“The Black Keys go jogging past the restaurant Keith and I go to. We’ll hang out with Jack White in the studio. And there’s music in our house all the time — Keith plays harmonica, drums, banjo, piano and bass guitar.

“He has a strong will about his career, and so do I. We want each other to thrive and do what we love, and we never interfere in the other’s career choices.”