media_removed_toofab 2013
Yeah, we're starting to think Kate Middleton never had a baby in there!

The Duchess of Cambridge flashed her ridiculously flat stomach while playing volleyball today during a public appearance at Sportaid Athlete Workshop in London.

Sporting horizontal stripes, a super cute navy blazer and skinny jeans, the new mom looked incredible -- and showed no signs of just giving birth only three months ago.

Kate and Prince William welcomed son Prince George back in July, and while she's already stepped out to a few events post-baby, this is the slimmest she's looked yet.

To be fair, unlike some stars, Kate didn't really gain any additional weight while she was pregnant -- and the day after she gave birth, she almost looked exactly like she did before got knocked up!

Not everybody has it as easy as the Duchess -- check out the gallery above to see more pregnancy Before & Afters.

Hot Videos