Kaley Cuoco-Sweeting might be best known for her adorkable role on The Big Bang Theory, but who knew this girl was secretly so ripped?

Kaley recently posted this goofy-looking shot on her Instagram of herself standing next to a bikini-wearing dude. But what really caught our attention was her super toned arms and abs.

All we can say is that we definitely wouldn't want to face-off against Kaley in an arm-wrestling match anytime soon.