Emma Watson was saying the other day that when Helena Bonham Carter was becoming Hermione, or trying to become her for the polyjuice-potion sequence, she was trying to take on Emma's mannerisms, and she was asking Emma questions like, "What's Hermione's favorite color?" Because she wanted to absorb all this information and to know, in here touches temple what she was like. And as I've tried to develop as an actor, I see that these things, however much they seem insignificant... By knowing what's Neville's Longbottom favorite Beatles song, you can know so much!