While for most, Halloween is the one day we can let our freak flags fly -- who doesn't love a good slutty firefighter? -- this year, if you're feeling like you've graduated from the fishnets and stethoscope days, ditch the nurses hat and put on your thinking cap instead.
But don't think too hard. We've scoured this year's best box office blockbusters and come away with costume ideas that will take you from sparkly Halloween party favor to high brow movie buff faster than you can say slutty pumpkin -- we're looking at you Katie Holmes.
From "The Ides of March" to "The Smurfs," check out these costume ideas: