Harry Potter teaser Poster

This poster is really effective, the lighting is half dark and light on the photograph making the actor look suspicious and scary, I think I would like to use an effect on my own figure in my poster. But I feel I would not be able to use a design like this for my poster. The picture is of Harry Potter, (Daniel Radcliffe) who is a well known character out of the book Harry Potter. But on the other hand for my poster I do not have a well known film star like, Daniel Radcliffe so I will have to have over things on my poster like the location where the film is set, furthermore I would like to be able to have the main figure on my poster looking as scared as possible, in comparison to the house. I want her to also to stand out from the background picture, so when people look at the poster they have questions like "what is the girl scared of?"I feel that this picture is perfect for harry potter but, would be completely the wrong image for my poster.