kidman230%20copy.jpgNicole Kidman opened up about her struggle to get pregnant for a second time, calling it a "rollercoaster ride."

"Anyone who's been in the place of wanting another child or wanting a child knows the disappointment, the pain and the loss that you go through trying," the Oscar winner told the Aussie edition of 60 Minutes. "We were in a place of desperately wanting another child. I couldn't get pregnant."

The 43-year-old eventually turned to surrogacy in order to have her newborn baby girl Faith Margaret (Nicole gave birth to Sunday Rose, her daughter with Keith Urban, in 2008.)

Nicole gets emotional when speaking about her surrogate, saying "She was the most wonderful woman to do this for us."

Kidman adds that the December 28th birth of her second daughter was "so deeply emotional and moving" and that she is "so grateful" to the woman who made it possible.

Nicole, who has two teenaged adopted children with ex-husband Tom Cruise, also won't rule out the possibility of more kids. "If you ask Keith, he'd be like 'no,' but my sister's got five kids. [Keith]'s like, 'you're not going to be like your sister, are you?' I'm at an age now where it's very hard to have a child when you're 43. We love what we have."