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Vintage Kardashian-Jenner Photos You Have To See

9. Pajama Party
Before there was a clan of six in the Kardashian-Jenner household, there was only Kourtney and Kim. Because of that, the two sisters grew up extremely close. In this photo posted by Kim in honor of Kourtney's birthday, the younger sister decided to share a onesie twinning moment.

Kim captioned the sweet photo, "Happy Birthday kourtneykardash I honestly can’t believe the life we have lived! It’s such a dream to go through it all with having a sister like you by our side! You have taught me so much throughout life. You’re such an amazing mom and friend! Can’t wait to celebrate you tonight! I love you beyond what you could imagine."