AceShowbiz -

Nicole Kidman bares all, from her skin to her never-revealed secret, for the October 2007 issue of Vanity Fair magazine. It was quite a shocking to read her interview with the publication as she tells her past secret that never comes to public's notice before.

Addressed her miscarriage while still married to former husband Tom Cruise, the movie siren said she lost a baby early in their marriage that was when she was 23. "From the minute Tom and I were married, I wanted to have babies. And we lost a baby early on, so that was really very traumatic," she revealed. "And that's when it came that we would adopt Bella."

The she went on adding, "There's a complicated background to that, given that I never speak much about many things. One day maybe that story will be told." When comes to question on having kids with hubby Keith Urban, Kidman said she's "yearning to have one. I think I would be very sad if I wasn't able to have a baby. Keith knows I want one, and he has been getting there slowly."

In a more shocking revelation, Kidman told the publication she was engaged to a man in between her relationships with then-husband Cruise and current husband Urban, but remained tight-lipped on his identity, explaining "I get engaged and I get married - that's my thing... I got engaged to somebody...I wasn't ready. We weren't ready."

The October 2007 Vanity Fair issue, having Kidman poses for numbers of sexy pictures photographed by Patrick Demarchelier, one of which shows her posing with her niece Sybella, hits newsstands in NY/LA on Wednesday and nationwide September 11th.