When we say Leonardo DiCaprio "lights up" an e-cig, we mean he made the little LED on the end of it glow!
While on set at Rao's Restaurant in East Harlem, New York, Leo was spotted taking puffs off his electronic cigarette.
He seemed to really be enjoying himself, even blowing smoke circles as he puffed away.
Sure, an e-cig is healthier than a normal cigarette because you're inhaling water vapor but still, you're smoking.
The nicotine itself is not good for you.
Don't fool yourself, just quit altogether!!
[Image via Pacific Coast News.]