In the picture, posted earlier today (8 April), little North, nicknamed Nori, can be seen holding a giant gold Chanel hooped earring, with Khloe's blonde hair clearly visible in the background.
Alongside the photo, Khloe, 29, wrote: "This little cutie stole my earring! I ain't mad at you North! #AuntieKoKo."
North West is Khloe's elder sister Kim's daughter. Kim and rapper fiance Kanye West welcomed their first child together in June 2013.
The Keeping Up With The Kardashians star has recently returned from a luxury holiday to Thailand with her famous family.
Since returning, Khloe has been back at the gym - and even posted a photo of her gym, alongside the caption: "I missed this place."
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