"I'm spontaneous. I jump in," she tells the magazine about the bold decision. "I kind of like getting married and then getting to know each other; I know that it sounds incredibly strange, but to me, it's a more natural process."
Incredibly strange, indeed, but seems to have worked out just fine. Nicole and Keith tied the knot in June 2006, and are still going strong eight years later.
The 47-year-old actress, who has four kids -- Isabella, 22, and Connor, 19, with ex-husband Tom Cruise, and daughters Sunday Rose, 6, and Faith, 4, with Keith -- reveals she's still hoping to have another child with the American Idol judge.
"Every month, I'm like, 'I hope I'm pregnant!'" she says. "I had my last one at 43. My grandmother had her last at 49."
Even when her publicist attempts to make the comment off the record, Nicole is happy to admit she's still got babies on the brain.
"'Off the record'? I don't mind!" she exclaims. "Why not, right? I wish I was!"
In the candid new interview, the usually private actress also surprisingly dishes on working with her now ex-husband on Stanley Kubrick's 1999 film Eyes Wide Shut. The erotic thriller famously took two years to shoot, but according to Nicole, she and Tom "loved it."
"Everyone thought that was when our marriage started to break down -- not at all," she reveals. "That movie was a great part of our life together, and I'm glad we have it."
And it turns out she also has the legendary director to thank for her enviable career.
"He would always say, 'You're a character actress, Nicole,'" she shares. "'Don't play leading ladies. Go and find the character roles.'"