What I wore to a party on Tuesday before going to the midnight screening

[bennet_7]

World's easiest Harry Potter themed costume: get a picture frame (sans glass and backing), carry it around all night, and tell people you're a wizard portrait. Invite people into your portrait.

Slightly more transportable version of the world's easiest Harry Potter themed costume: construct a picture frame out of cardboard. Fold it up and put it in your bag when it's time to watch the movie.