Do you remember in teen flick classic Mean Girls when Cady turns up to the Halloween party and all of the other girls are dressed up as sexy cats and mice in stripper-esque lingerie?
Well, don't think that you have to succumb to the female Halloween whore trend this year, as we've collected together some costume ideas for your inner girl geek.
Olivia Wilde made Quorra one of our favourite girl geek idols in Tron: Legacy last year. You'll also need: We also recommend you get a Tron Identity Disc from Party City too. Available from Party City for $54.99.