Kris Jenner, Kim and Khloé Kardashian Celebrate 'Special Soul' Kourtney Kardashian on Her 45th Birthday

Khloé Kardashian said she and Kourtney were "twin souls" and their bond was "irreplaceable" while Kim said it's been the "most magical journey" to have her sister by her side for the last 45 years

Kourtney Kardashian Barker is officially 45, and she has no shortage of love in her life!

To honor the oldest sister of the Kardashian-Jenners, her loved ones have showered her with love across social media. But it was her mom Kris Jenner who kicked off the tributes, posting a photo carousel featuring pics of Kourtney from childhood onward.

"Happy birthday to my firstborn babydoll @kourtneykardash!!!!!! What in the world is happening, time is twirling so fast and I can’t believe you are 45!!!" Kris, 68, captioned the Instagram post. "It seems like just the other day you were wearing your 5 year old party hat going to Buckley to be the line leader and I was bringing cupcakes for the class to celebrate."

"Well you have grown into the most beautiful and amazing daughter, wife, mommy, sister, auntie and best friend a girl can have," she continued. "You are a kick ass business boss and I am so proud of you every day! Thank you for making me a grandma for the first time and for every single moment and memory we share. I love you beyond measure ❤️🙏🏼."

In response to the thoughtful message, Kourtney — who showed off a gorgeous flower bouquet gift on her Instagram Stories — wrote: "I love you mommy! ❤ time is flying so fastttttt! So grateful for every memory with you."

The reality star's sister Khloé Kardashian also commented on Kris' sweet tribute.

"Happy birthday my dapper little cutie," the Good American mogul, 39, wrote. "We love you my Janey balls! I love love love you my little slice of apple pie."

In her own Instagram tribute, Khloé called Kourtney "my sugarplum fairy [and] my teeny tiny box of treats" before praising her sister.

"You deserve every ounce of happiness, love and blessings that you receive! You deserve only greatness in this world! You are such a special soul. The rarest of the rare. I miss you right when I leave you! I can’t wait for you to be done breast feeding so we can wrestle. You promised me last year that we would start wrestling again. A girl is waiting patiently but tick tock babe," she joked in her caption.

Continuing, Khloé wrote beside photos of the duo over the years, "I am so happy for the love and life that you have found. I hope you know every single day just how i adore you and how I can’t live without you. You will always be one of my best friends/favorite people in this world. What would I do without you? I never want to go through a moment of this life without you. The laughter we’ve shared and share I’ll crave forever. There’s something about you and I... We are two peas in a pod. We go together like peanut butter and jelly. We are twin souls. Kourt you are irreplaceable to me. It’s hard to put into words the way I feel about you and our bond. Nothing can break you and I. My wish is that you continue to sparkle and radiate love and happiness. I pray that the magic in you only gets stronger and the fire of life I see in you never ever dims."

Related: Kourtney Kardashian Reveals Birthday Cake Poking Fun at Sister Kim Calling Her the 'Least Exciting to Look at'

Kim Kardashian also left some birthday love for her sister on social media, sharing a photo of the sisters at the beach.

"Happy Birthday Queen @kourtneykardash There’s no one on this planet that I have spent more time with and have all of the same memories with growing up than you and I cherish them all. Sharing a room and friends and cars and our lives together for four decades has been the most magical journey to have you by my side," she wrote. "I love you and I can’t wait for another 45 years together! I will especially cherish this last sister trip where all of our kids had dance parties til they passed out, the way we all did growing up! Celebrating you today and grateful to you forever for always giving the best advice a sister could possibly give!"

In response to Kim's post, Kourtney wrote: "This caption 🥺❤️ I love you sooooo and so grateful for all of the incredible memories we have together… when I think it, it’s like a movie plays in my head of all of them! So blessed! ❤️🙏🏼"

For her part, Kylie Jenner shared an old photo of her and Kourtney on her Instagram Stories and wrote beside it, "it's my big sister's birthday"

The famous family have been celebrating the Poosh founder’s 45th all week, with Kourtney posting a series of photos on Instagram Sunday showing off a selection of cakes poking fun at the sisters.

Kourtney captioned the carousel post “mood 🎈,” with the first photo showing her laughing on a yacht alongside a large cake.

Written on top of the dessert was a gold and orange glittery cake topper that read ‘Happy Birthday To The Most Exciting To Look At’ — referring to Kim previously calling her “the least exciting to look at” during an episode of their former reality show, Keeping Up with the Kardashians.

Related: Kourtney Kardashian Reveals She Drinks Her Own Breast Milk: 'Just Pounded a Glass'

The other cakes read “Aries Baby” and “Just Living Life,” a saying Kourtney often uses on the family’s Hulu show. A few other personalized classic “Happy Birthday” cakes were featured in the post too.

The photo dump also included images of Kourtney as a kid celebrating her birthdays during her childhood. One sweet snap showed mom Kris smiling at the camera as toddler Kourtney stood beside her with a party hat on.

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The past year has held a lot of excitement for Kourtney. She welcomed her fourth child and first with with husband Travis Barker, a boy named Rocky, in November 2023 after sharing their difficult pregnancy journey on The Kardashians.

Related: Khloé Kardashian Says She and Sister Kourtney Are 'Twin Souls' in Gushing 44th Birthday Tribute

In addition to their new baby, the couple is also parents to six children between them.

Kourtney shares Reign Aston, 8, and Mason Dash, 13, plus daughter Penelope Scotland, 11, with ex Scott Disick. Barker is father to son Landon, 20, daughter Alabama, 17, and stepdaughter Atiana De La Hoya, 24, with his ex-wife Shanna Moakler.

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