Being a committed CGM fan, I just finished reading "The Invention of Hugo Cabret" by Brian Selznick which I found in the library.
It's a thick book but an easy read because it's written like a graphic novel with text mixed with a lot of illustrations. A fun read for all ages. I think filming is about to start and if they follow the book, the main roles will be Asa Butterfield (Hugo) and Ben Kingsley (Georges) with Chloe (Isabelle) supporting them. Sacha Baron Cohen plays the stationmaster in the film but he has a minor part in the book.
Isabelle reminds me a lot of Chloe's role in Diary of a Wimpy Kid - strong and smart (wait, that's Hit-Girl too).
Apart from having an english accent, Chloe also said she has to cut her hair for the role and I have included some scans from the book to show how the original Isabelle looks.
The story has a lot to do with the early history of cinema so I can see a lot of film buffs going to see it as well as some oscar nominations coming up.
Anyway, I recommend checking the book out.
Edit: Added picture of the book