I must admit it's a perfect format for the book and a very wise decision for both ladies. Very happy to hear it.
http://www.hollywoodreporter.com/live-feed/reese-witherspoon-nicole-ki dman-star-752316
http://deadline.com/2014/11/nicole-kidman-reese-witherspoon-star-big-l ittle-lies-limited-series-david-e-kelley-1201296852/
The third character is a young woman, a mother, mistaken for a nanny, due to her age. WHo would you like to play that part? I, for one would like a not so well known actress, I am very fond of Anna Kendrick for reasons beyond my comprehension... 😃 Or is she "old" for that part? And they need someone like Dakota Fanning? I think Dakota would be great.
Either way, I am not that fond of Reese Witherspoon (I like her, but thats that), but it seems she is involved in many interesting projects, as an actress and as a producer.