There's no doubt about it: Nerd-chic is having a moment in the fashion sun. We're talking about looking like you've borrowed your grandma's old sweater and pairing it with some math geek frames or goody-two-shoes knee-highs, and it's exactly this kind of aesthetic that L.A label Wren does so well in their fall lookbook, shot by Kava Gorna. But there's something insouciantly sexy about the nerd-chic Wren girl, whether it's in pairing a prim plaid skirt with a saucy little sequined cardi, or topping off a kind-of-racy white lace dress with a nice and proper plaid coat. As a matter of fact, it's just the kind of thing we can imagine on Wren fan and former lookbook model, Alexa Chung. If you don't think you'll have the money to shell out for Wren's wares, may we suggest digging through your granny's closet...we're willing to bet she has more than one houndstooth skirt in there that you can cut up and make modern again.