The incredible shrinking siblings!

Khloe and Rob Kardashian have both been on a weight loss journey this year, and they took to social media yesterday to let everyone know they're winning the battle of the bulge. The blonde beauty showed off her rock hard abs in the bathroom mirror in a Snapchat video, and her sock designer bro posted a rare full body photo on Instagram.

Khlo sticks to a strict diet and works out daily, while the daddy-to-be is getting support and motivation from fiancée Blac Chyna. It seems like just yesterday that Internet trolls were calling the blonde beauty "the fat sister" and body shaming Rob, but their progress has officially silenced the haters!