In the black and white ad, the actress is pictured wearing her gym gear and clutching a bottle of the mineral water.
"My workout partner. Working out feels great...afterwards," the ad reads. "That's why I drink Smart. It's hydration I can feel. (And it's one part of my routine I never sweat.)"
Jen has been a spokeswoman for Smartwater since 2007. And, she looks so great and amazing in the new ad!