"Pinky swear we’re besties for life!!!", Kim, 38, captioned the adorable snap of her and North, 5.
The mother and daughter duo appeared to be at a beach when the pic was taken.
North wore a gold bathing suit top and lime green shorts while Kim sported a bikini and hat for their adorable moment.
"You two are amazing!!!!" Khloe Kardashian wrote in the comments. "Besties for life."
North is the oldest child of Kim and Kanye West. She has three younger siblings: brothers Saint and Psalm and sister Chicago.
Kim, Kanye, 42, Saint, 3, and North stopped by a local Cheesecake Factory in Ohio not once, but twice last month.
What are your thoughts on Kim and North's adorable moment? Sound off in the comments!