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Fashionable person Blake Lively is hopefully kickstarting a worldwide trend with her latest Instagram, in which she proudly displays some nerdtastic nail art. Lively's Harry Potter nail art shows that the actress (and wife of Ryan Reynolds) has at the very least read seven books in her life—or watched eight movies—as her nail is a shoutout to the final installment of Harry Potter.

I solemnly swear that I am up to no good. 👞👞 👞👞 📜 👞👞👞👞

A post shared by Blake Lively (@blakelively) on

I solemnly swear that I am up to no good.​

Sources: h/t The Cut