They're making Big Little Lies by Liane Moriarty into a movie. I'm not very surprised since it's practically a screenplay in itself. Meaning, the story lends itself very well to being a movie and, with the right director and screenwriter, could be very good! This article says that Reese Witherspoon and Nicole Kidman are attached, which sounds good.
Celeste- Nicole Kidman
Madeline- Reese Witherspoon (only because she is too old to be Jane)
Jane- Emma Stone (as a blonde)
Have you read this book? I really liked it!