Kaley Cuoco introduces her sister on Instagram!

Image for Kaley Cuoco introduces her sister on Instagram!

Kaley Cuoco celebrated "National Sibling Day" by showing a selfie she took with her sister on Instagram.

The star of “The Big Bang Theory” shared this picture on social networks, and we see that her sister, Briana Cuoco, 28, looks a lot like her!

Check out the photo:

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