The book makes me want to see the movie (though I've been told the book is better). It's always like that though. It's so hard to compete with our own imagination! We see the same places differently in our heads. You may even imagine the way a character may look or sound because you had a mental snapshot in your mind and it may be so different from what you see in the movie.
I'm sure it's happened even in every day life on your mobile phone. If you had a stranger's voice in your ear and you can't see the person, you may wonder whether the face goes with the voice. I was speaking to a friend's friend whom I'd never met trying to get directions to her house. It was crazy how lost I was getting. We started laughing because it was getting worse and worse. I was apologizing profusely and joking that he would miss the whole dinner trying to get me back on the right road.
When I finally arrived at my friend's place, he wasn't what I'd expected. He was so friendly on the phone, even in person. I thanked him for all his help of course and it was definitely the same guy but I didn't expect such a hard face. He didn't look approachable in any way but sometimes, a hard looking person is actually a softie trying to look fierce so people don't take advantage of them. Moral of the story is a cliche but true in this case. You just can't judge a book by its cover!