Kourtney Kardashian's Family Celebrates Her 40th Birthday With Flashback Photos and Heartfelt Messages

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Kourtney Kardashian
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Kourtney Kardashian has entered a new decade!

On Thursday, much of the Kardashian family took to Instagram to wish the eldest sibling a happy 40th birthday. Khloe Kardashian wrote a lengthy message to her older sis, saying that she's "completely obsessed with each and everyone of my siblings."

"Still blows my mind how blessed we are to call each other sisters. You and I have an incredible rare bond that no matter what, it can never be broken. You’re my best friend, one of the rare few I can count on most in my life. I’m so thankful for that," Khloe wrote alongside a collection of both funny and sweet pics with the Kardashian sisters. "I know that so many people go through life without their sister as their best friend, or without a sister in general and I don’t know how they do it. Honestly, without you my life would be boring and not as full."

"Today and every day, I pray that your soul is awakened and from your core, you’re happy!" she continued. "You deserve only magical things for the rest of your life! In all of the lifetimes before and in all of the lifetimes after, I will love you! To the happiest of birthdays my sweet sister!! Jane or Suzanne (I forget who’s who) I love you!"

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Happy birthday sweet @kourtneykardash!!! I am completely obsessed with each and everyone of my siblings. Still blows my mind how blessed we are to call each other sisters. You and I have an incredible rare bond that no matter what, it can never be broken. You’re my best friend, one of the rare few I can count on most in my life. I’m so thankful for that. I know that so many people go through life without their sister as their best friend, or without a sister in general and I don’t know how they do it. Honestly, without you my life would be boring and not as full. Today and every day, I pray that your soul is awakened and from your core, you’re happy! You deserve only magical things for the rest of your life! In all of the lifetimes before and in all of the lifetimes after, I will love you! To the happiest of birthdays my sweet sister!! Jane or Suzanne (I forget who’s who) I love you!

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Kim Kardashian West likewise marveled over their lives, alongside throwback pics of the duo wearing pajamas, hanging with their dad, playing together and smiling as teenagers.

"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!" Kim wrote. "Can’t wait to celebrate you tonight! I love you beyond what you could imagine ✨"

Kim also shared both throwback and more current pics on her Instagram Story to celebrate her sister even more!

Kim Kardashian
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Kim Kardashian
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Kim Kardashian
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Kim Kardashian
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Kim Kardashian
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Kim Kardashian
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Kourtney's mother, Kris Jenner, also expressed her love for her oldest child online. The proud mom shared snaps of Kourtney as a baby, grown up and, eventually, with her own kids, Mason, 9, Penelope, 6, and Reign, 4, whom she shares with her ex, Scott Disick.

"Happy Birthday Kourtney!!! I can’t believe you are 40!! I love you more than you can ever imagine...you will always be my baby," Kris gushed. "I am so blessed beyond words to be your Mommy and have you by my side in this precious life...you are my heart and I am eternally grateful for all of the memories that we cherish. I love you. Mommy xoxo @kourtneykardash #happybirthdaykourtney #love #familyiseverything #firstborn ❤️"

In a sweet video message posted earlier this week, Kim, Khloe and Scott sent the birthday girl even more love.

"Good lordy, you're turning 40, Kourtney!" Kim exclaimed in the clip. "I can't even believe this is how old you are. When I think of you and your birthday, I think of dancing drunken nights in Mexico, so I can only imagine how big we're gonna do it up for your 40th birthday."

"I'm always so proud that you came before me, so I've always copied you and watched everything you've done and followed in your footsteps. So thank you for being the best sister, the best mentor," Kim continued. "I love you. Happy birthday."

Khloe continued with the sweet messages, but made sure to tease her big sis too!

"Happy birthday, Kourt! I love you so much. You will always be the Jane to my Suzanne; the Reeses to my pieces; the peanut butter to my jelly," Khloe declared. "I really can't imagine my life without you. I love you so much. I think you're one of the funniest people I know when you're actually paying attention at life. I love you. Have the best time."

"And I hope you drink tequila until you vomit all over yourself and sleep in it because you actually have done that a couple of times," she quipped before blowing a kiss.

Scott was joined on camera by their son, Mason, while their daughter, Penelope, kept shouting ideas for birthday messages from off camera.

"Happy birthday, Mom. Happy 40th. We wish you another happy 40 to come. Keep up the good work," Scott said. "And you look very young, [Penelope] says. We love you so much. We appreciate everything you do and do for us. And you are a wonderful, wonderful mom."

"We want to see you get older and shrink and get smaller," he continued. "Anyway, we love you very much. Everything is awesome about you, Mom. We love you very much. Happy 40th."

Kourtney celebrated her own birthday on Instagram too, sharing snaps of herself hanging with Big Bird on her second birthday. "My second birthday ? big bird has come a long way," she captioned the pics.

Watch the video below for more on Kourtney. 

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