I think it's the source material. 27 Dresses was a famous book, and Devil Wears Prada was also a wonderful book, so it's coming out of the novelists who are really creating these wonderful female characters that we want to see on the big screen.
Casting is so important, with any film you do. You have to get actors that you believe will fulfill the promise of the characters that are on the page.
Sophie [Kinsella]'s writing just captivated me. We bought this eight years ago, before it became an international success and was only one book. Now there's five. So, we were very fortunate to latch onto a character who has since become an international success both as a novel and hopefully now as a movie.