Kylie Jenner gave niece North West a mini-makeover on Snapchat, Sunday, when she let her try out one of her famous Lip Kits.

Kylie documented the whole thing on her Snapchat account, while telling the three-year-old: “What happens at auntie Kylie’s, stays at auntie Kylie’s.”

In the first clip Kylie showed North West and her bestie Ryan Romulus with one of her lip kits and exclaimed: “They’re putting on my lip kits!”

The 19-year-old was then filmed painting North’s lips and saying: “Okay, you wanted black, yeah…aww your little lips.”

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She then asked the three-year-old, “Do you like it?” and judging by North’s happy face she was a big fan.

Kylie ended by posting a snap of Ryan and North holding the Kits, which she captioned: “What happens at auntie Kylie’s, stays at auntie Kylie’s.”

The fun took place after Kylie helped boyfriend Tyga celebrate his son King Cairo's third birthday with a Ferrari-themed party.

Guests at the bash included, Kris Jenner, Caitlyn Jenner, Kourtney Kardashian and Kendall Jenner.

It was King Cairo’s second party of the weekend, having celebrated a day earlier with mom Blac Chyna and her fiancée Rob Kardashian, with another Ferrari-themed bash.

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Paying tribute to her son on Instagram, proud mom Chyna wrote: "Happy 4th Birthday to my first born son King Cairo.

"Over the years you have made me a better version of myself and I will always continue to give u unconditional love and support !!! I love you so much my little Ferrari man."