Proud mum Kim Kardashian shared the snap on her Instagram page with the caption ‘BFFs.’
It also became clear who North takes after when Kim shared a picture from her 4th birthday- she's the double of daughter North.
Kim has previously spoken out in her reality show about her desire to have children at the same time as her sisters so that their offspring can grow up together.
It looks like Kim’s dream is coming true, as judging by this cute pic North and Penelope look set to be lifelong best friends.
Penelope is sister Kourtney’s second child with partner Scott Disick. She also has a 4-year-old son, Mason.
Kim revealed in an interview with America talk show host Jimmy Kimmel that Mason was protective of his cousin and younger sister.
Kim's mum, Kris Jenner, also recently spoke about her granddaughter North, describing her as 'the perfect child.'
We bet these two will grow up to be just as fashionable as their glamorous mums!