Grumpy Cat is a phenomenon that the world is only now beginning to understand. On September 22, 2012, her owner posted an image of her to Reddit, causing a wide range of responses (from "is her frown Photoshopped?" to "why so serious?"). Since then, she's become famous online for her curmudgeonly disposition, getting recognition at tech conferences, on television, and even commercial sponsorship.

All jokes and Friskies commercials aside (yes, she's on that level now), Grumpy Cat is one of the world's most viral memes and a reminder to just cheer up sometimes. Here at Complex Art+Design, uniting humor and art is our job, hence this very rare assortment of images, titled Grumpy Cat in Famous Works of Art. Enjoy.

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