Kidman, who is now happily married to Keith Urban and a mom of four, says she can't help but let her personal life into her work.

"We're taught to bring everything—the state of being, the environment—and use it. If it's raining, or the other actor doesn't know his lines, everything has to be used," she said. "So your own emotional state comes into play, and I certainly remember that happening a lot on, say, The Hours, when I was going through an enormous amount of turmoil. And even though it was appropriate at times for the character [Virginia Wolf], at other times it wasn't. But I would just bleed into it; it would manifest in different ways."

Kidman will next be seen in the thriller Secret in Their Eyes with Julia Roberts and Chiwetel Ejiofor. The movie hits theaters on Nov. 20.

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