“BFF’S” she wrote.
The picture shows her and Kanye West’s daughter in a white outfit and yellow bib.
(Isn’t she seriously a perfect mix of her superstar parents?)
She focuses on the camera, as her 20-month-old cuz (rockin’ an adorable gray cable knit sweater) holds on to her on a couch.
“its so cute how they all love each other so much!” she said.
“Penelope & North are bff! Mason bosses them around and is super protective.”
Earlier that month, the two Kardashian sisters were seen shopping together with the tiny BFFs in tow.
This is the 11th photo the Keeping Up With the Kardashians starlet has shared of North.
Kanye, 36, debuted their gal on the finale of Kris Jenner’s talk show in August.
Since then, Kim has uploaded multiple shots on Instagram and revealed three personal pics on the Jan. 17 episode of The Ellen DeGeneres Show.
"It completely changed my life," she gushes about motherhood. "You have a different set of priorities. Nothing matters except your brand new family."
As for fatherhood, Kanye says, “All I can say is that I’m happy I have it.”