Kim Kardashian honored her sister, Kourtney Kardashian, on her birthdayCredit: Instagram/KimKardashian

Kourtney turned 45 on April 18Credit: Daniella Midenge

On Thursday, The SKKN creator honored her big sis, Kourtney, on her 45th birthday today with a special birthday post on her Instagram account.

The Skims founder’s post dedicated to the eldest sibling of the Kar-Jenner clan included a snap of the three Kardashian sisters posing on a beach.

Each of them had on an itty-bitty black bikini that slightly varied in style.

Unlike Kim, who wore bottoms covering the lower half of her bikini, and Khloe, who wore a sarong over her bikini bottoms, Kourtney let her swimsuit show in full.

All three Hulu personalities looked carefree on the tropical beach, enjoying the sun with the crystal clear ocean behind them.

“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,” Kim captioned.

She added: “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. 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!”

SHUTTING IT DOWN

Ironically, Kim’s sweet gesture toward Kourtney was interpreted as her being shady by some fans who assumed the latter wouldn’t find the photo flattering.

Given that Kourtney is still recovering from having Rocky, who she birthed in November 2023.

“Now you know she’s not going to like this photo… lol it’s her bday Kim… lol,” one critic claimed.

Kourtney tackled the notion head-on, revealing that she was completely confident in her postpartum figure.

“I LOVE this photo! It is me and my sisters having the best time on a trip with our kids… and the memories to last forever,” she clapped back at the critic.

“And I LOVE this body that gave me my 3 big babies and my little baby boy.”

I love this body that gave me my three big babies and my little baby boy.

Kourtney Kardashian

A plethora of fans shared how much they loved Kourtney’s body also.

FAN REACTIONS

Many praised the new mom of four for embracing her naturalness and not running to a plastic surgeon.

“Can we talk about how good Kourtney looks tho!!! 4 kids later and naturally showing it off,” a fan complimented.

“Kourt looks so fire postpartum,” another agreed.

“I think Kourtney looks absolutely gorgeous yay for her looking real,” a third person shared.

“I don’t know what everyone is on about Kourtney looks GREAT ! I don’t even look like that and I didn’t have a baby a few months ago,” someone else raved.

Kim’s birthday post dedicated to Kourtney showed them her, Kourtney, and their sister, Khloe Kardashian, beachside in black bikinisCredit: Instagram/Kourtney Kardashian Barker

Some fans thought that Kourtney might take offense to the pic Kim used because they assumed Kourtney would find it unflatteringCredit: Instagram/kourtneykardash

Kourtney tackled the notion head-on, clapping backCredit: Instagram