Rosemary: still the cinetrix's most successful and cinematic Halloween costume.
Appropriately enough, perhaps, the cinetrix is so tired today she's inclined to pass on the holiday altogether. If pressed, I could swing a last-minute Little Edie, but my fear is that no one will be able to tell the difference between that and my usual mufti.
So, what's your best movie-inspired get-up? One of my students apparently kicked it old school as the original Veruca Salt. Top that--in the comments.