The 28-year-old actress feels she has grown up and is finally responsible enough to settle down and start a family.
She said: "I feel like I`m coming into my womanhood, and I`m less afraid or maybe I`m just getting old. I think about having kids, but I think you can`t plan for that sort of thing. It`s not like you can work at it."
The `Closer` star recently played "strong" and maternal Grace Cahill in the war drama `Brothers`, alongside Tobey Maguire and Jake Gyllenhaal.
Natalie has reconsidered her views on motherhood since starring in the movie.
She explained: "It was such a fantastic opportunity because so many parts written for females my age are just like the cute, girlish love interest. To get to play a real woman who`s really strong and a good mother was really a great opportunity. It was not that challenging to be mother-ish because I have the most maternal mom in the world. So I`ve had a role model for my entire life."