The reality TV star, 36, chose to borrow from Scott Disick's wardrobe this week and managed to look super chic.
Mum-of-three Kourtney teamed one of Scott's staple checked shirts with knee-high grey boots, a white handbag and... very little else!
Posting a stylish selfie, Kourtney wrote: "Wearing @letthelordbewithyou shirt today! Ps: this weather is putting me in the mood for Halloween!"
While we think Kim Kardashian's older sister looks great in the shirt-dress, we wonder what long-term partner Scott thinks of his wardrobe being raided?
Then again, this is the couple who seem to share everything...
Not only do they have their relationship put up for scrutiny on Keeping Up With The Kardashians, they also documented the birth of their first two children Mason and Penelope.
And recently, Scott was filmed waxing a heavily pregnant Kourtney's bikini line...
Kourtney has made no secret of the fact she is trying to regain her pre-baby figure after giving birth to son Reign in December.
If this picture is anything to go by, she already looks pretty amazing to us!
All you need to know about Kourtney Kardashian in just one minute:
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