It's official: Jennifer Aniston is expecting triplets - in a funny new commercial.

"How are my little triplets doing?" Jen asks her enormous baby bump, which is exposed for the entire world to see in a brand new - and very satirical - ad for Glaceau Smartwater, for which Jen, 43, has been a paid pitchwoman since 2007.

The 2½-minute ad, introduced by Ryan Seacrest, pretends to be a leaked home-security tape. 

What's revealed around Aniston's backyard pool, which is being filled with bottles of Smartwater by some hunky pool-boys, is her grown son, portrayed by Jimmy Kimmel

"Go upstairs and take a nap," Aniston tells the man-boy, right before his space-alien sibling comes out to join him.

But there's more! The truth reveals about Aniston's enviable hair as well...Check out the video below...

It is a hilarious commercial, isn't it? 

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