We both [with Suzanne Collins ] felt strongly that you wouldn't want to age up the characters, no matter the age of the actors playing the roles. They should be playing the age that they are in the [Hunger Games] books. It would let people off the hook, if you said, "Well, instead of 12 to 18, why don't you make them 18 to 25 or 16 to 21?" If you don't stay true to the horror of the fact that they are 12 to 18, you're not doing justice to the book.