Logan Lerman as Simon

Simon is a young boy who isn't very muscular or manly.

Logan Lerman has a young face and isn't buff.

Cara delevingne as Nora

She has a young innocent face. Nora is young but brave and wise. I feel as though cara has that face that portrays those qualities.

zach Galifianak as Ivan

Ivan is a big Russian man. Zach isn't tall but some what resembles Russian with his scruffy red hair.

Betty White

Betty white is a cute little old lady with a comical face. As I read the story I immediately pictured her for the role.