Nicole Kidman has pledged never to reveal secrets about her life and her relationship with former husband Tom Cruise.

"I have never discussed the intricacies of it and I never will," the Telegraph quoted her as saying.

"I burned most of my journals after I remarried. You're only going to find out bad things," she added.

The 42-year-old star further said: "I am not writing a book. I will go to my grave with all my secrets, all my stories."