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Happy Birthday tomorrow beautiful @kourtneykardash !! I know it's crazy but I remember this pic like it was yesterday.. You have brought so much love, joy, and happiness into my life and I'm proud to be your Mom.. You teach all of us everyday what it means to be an amazing daughter, Mom, sister, friend, and a genuinely beautiful human being. Thank you for being such a bright light and an inspiration to me every day.. You are kind and patient and have the biggest heart and I love you more than you will ever know. You will always be my firstborn who captured my heart…. Oh, and I'm really sorry about this outfit I put you in….I love you, mommy #love #blessed #mybaby

A post shared by Kris Jenner (@krisjenner) on Apr 17, 2016 at 8:44pm PDT

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Happy birthday @kourtneykardash!! Enjoy this special day! I love you!! #mybaby #love #family

A post shared by Kris Jenner (@krisjenner) on Apr 18, 2016 at 7:11am PDT

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Happy birthday @kourtneykardash!! What would our family do without you?!?! This picture sums us up, even though I'm covered in chicken pox, you're still chillin by my side. I love you!!!

A post shared by Khloé (@khloekardashian) on Apr 18, 2016 at 7:27am PDT

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Happy Birthday @kourtneykardash Thank you for always doing everything first so I can copy you! I don't know what I would do without you! I love you! Happy Birthday!

A post shared by Kim Kardashian West (@kimkardashian) on Apr 18, 2016 at 6:39am PDT

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Lol I love you Kourtney. You already know you are my favorite sister these days.. Thank you for teaching me to see the glass half full through everything. Happy birthday 💛 ps. Mom in the background

A post shared by Kylie 🤍 (@kyliejenner) on Apr 18, 2016 at 9:54am PDT