What should I wear for a Harry Potter interview?

So, I was chosen to be interviewed about the upcoming Deathly Hallows movie and whatnot for a newspaper, and they're going to take a photograph. I'm asking all of you HP fans out there- what do you think I should wear? I have a full Gryffindor uniform, including a robe and a realistic Hermione wig. But, I also have TONS of HP tee shirts (Snape shirt, I <3 George Weasley, Hogwarts, two Gryffindor, lots others) and I have the Emma Watson pixie cut. So any ideas on what I should wear for my interview? Any help would be greatly appreciated!