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OTRC: Nicole Kidman felt vulnerable filming 'Rabbit Hole' because of baby

Nicole Kidman speaks to OnTheRedCarpet.com about the film 'Rabbit Hole' in December 2010.

Nicole Kidman says she felt vulnerable playing a mother who deals with the death of her young son in the upcoming film "Rabbit Hole" because she had given birth to her daughter just a year before.

Kidman, 43, and her second husband, country star Keith Urban, welcomed their first child, daughter Sunday Rose, in 2008. Kidman also has two adopted children from her marriage to actor Tom Cruise - Isabella, 18, and Connor, 16.

"My daughter was 1 when I shot the film," Kidman OnTheRedCarpet.com. "To have a baby and to have just recently given birth to her, that put me in a place of rawness, of vulnerability."

In the film, Kidman's character meets with the teenage driver who accidentally ran over her son, while her husband, played by Aaron Eckhart, smokes marijuana with a member of his bereavement support group.

"I suppose my biggest thing with the role was having her emotions and her pain pulsating underneath but not wearing them on her sleeve," Kidman said about her character. "The layering of that means that you have to have all of that throbbing inside but not let it out and when you do let it out, it's at erratic moments and then you have to feel the absolute intensity of it."

Kidman, who won an Oscar for her part in the 2003 film "The Hours", was recently nominated for a Golden Globe for her role in "Rabbit Hole", which is set for a limited release on Friday. (Check out the full list of 2011 Golden Globe Award nominations).

"It took more than four years to get our little movie off the ground, and to be recognized for my work in a film that means so much to me is truly such an honor," Kidman said in a statement when she heard the news.

Kidman is also set to be honored on Feb. 5, 2011 at the Santa Barbara International Film Festival with the Cinema Vanguard Award, which is given to actors who have taken "artistic risks" and have made a "significant and unique contribution to film".

Meanwhile, Kidman is set to return to Broadway in the fall of 2011. She will play Alexandra Del Lago, a faded and often drunk movie actress, in a revival of the Tennessee Williams play "Sweet Bird of Youth".

The actress made her Broadway debut in 1998, when she starred for one season in the David Hare play "The Blue Room", which featured a much-hyped moment in which she flashes her butt briefly.

The original 1959 production of "Sweet Bird of Youth" starred Geraldine Page as Alexandra and Paul Newman as the gigolo Chance.

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