Casting for the movie

Protagonist: Sylvia

I would pick Baliee Madison to play Sylvia because they are the same age, and Baliee has acted in movies which are in the wood, and would be comfortable int hat setting.

Antagonist: the hunter

I would pick Dylan O'Brien to play the hunter because he looks like how the author portrayed him to be and is a good actor.

Minor character: Mrs. Tilley

I would pick Meryl Streep to play the grandmother because she has acted in a lot of movies and is a very good actress.