This. Is. Amazing. (and yes, I DID combine two genres in this post title. Impressed?)
A Harry Potter - theme Halloween party that wins everything. Sophisticated yet whimsical, creative to the n-th degree.
The awesomeness started with the invitations. The second line reads "The Apartment at the Top of the Stairs." Brilliant.
Note the Lily and James Potter headstone at Godric's Hollow.