If you happen to look like Emma Watson then you'd be cerita lucah suhana kawan kelaskufoolish not to take advantage of it, right?

Kari Lewis, a cosplayer and Hufflepuff from Indianapolis, U.S., looks more than a bit like the Harry Potterstar -- and judging by her recent Instagram posts, she's certainly trying to make the most of the similarity.

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"I didn't know who Emma Watson was when I was first spotted at a postal office and a couple of young girls told me I looked like 'Hermione Granger'," Lewis told BuzzFeed.

"If it wasn't for those two young girls, I probably wouldn't have known about Harry Potteruntil a bit later. I think they sort of started my dive into the Harry Potterworld."

Now Lewis often cosplays as Emma Watson -- and her various characters -- and shares the photos on her Instagram and Twitter accounts.

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You can really get a sense of their similarity from the following two black-and-white, side on photos.

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Oh, and here's a composite that's half Lewis, half Watson.

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Even a well-made Polyjuice potion would struggle to produce such a spell-binding likeness.