Kendall Jenner flipped off her sister Kylie in a new postCredit: Getty

Kylie sent Kendall a flower bouquet with a note teasing her age as being two years olderCredit: Instagram/kendalljenner

It showed an up-close shot of the gorgeous arrangement with a note sticking out of the center.

The message read: “Happy birthday sister 30 years old !!!! Times flies [sic] Love you, kylie.”

It was a subtle dig from Kylie, 26, as Kendall had only turned 28.

The supermodel apparently wasn’t fond of the joke, as she wrote “lmao” and a middle finger emoji over the photo.

However, Kylie did attend Kendall’s birthday celebrations and shared a snap on her Stories from their evening.

The reality star captured her big sister surrounded by numerous birthday cakes lit with candles – one appearing to have the model’s face on it.

Kylie wished her sister a Happy Birthday beneath the snap with a couple of white heart emojis.

Just like most of the Kardashian-Jenner siblings, Kendall and Kylie have remained close, even after achieving massive fame.

The girls were just pre-teens when their family first hit the reality TV circuit with their E! series, Keeping Up With the Kardashians in 2007.

Kendall and Kylie are the youngest of matriarch Kris Jenner’s kids, whom she shares with her ex-husband, Caitlyn Jenner, 74 – formerly Bruce Jenner.

Kris, 67, is also a mother to three older daughters, Kourtney, 44, Kim, 43, and Khloe, 39, and a son, Rob, 36, with her late ex-husband, Robert Kardashian.

Despite being the youngest of the clan, Kendall and Kylie have each raked in impressive net worths between reality TV, modeling, and their numerous business ventures.

According to celebritynetworth.com, Kendall’s net worth is $60million as of 2023.

However, she is not even close to reaching the heights of Kylie, who has an estimated net worth of $680million.

Regardless, the sisters have maintained their tight bond and even came together for joint Halloween costumes last week.

The pair underwent major transformations for their costumes, channeling characters from the classic 1995 film Batman Forever.

Kylie shared photos of their getup on Instagram, showing the Kylie Cosmetics founder dressed as Debi Mazer’s character, Spice, from the flick.

The TV personality sported tight black lingerie that hugged her curves, heavy makeup, and a dark wig styled sky-high with red steaks.

Meanwhile, Kendall went as Drew Barrymore’s character, Sugar, rocking white lingerie, a white coverup, and a curly blond wig.

Kylie also posted a silly TikTok video of the duo recreating a scene from the popular 2004 teen comedy Mean Girls while dressed in their costumes.

Kendall acted afraid of Kylie with her “scary” attire while Kylie pointed out that it was a spooky holiday.

Fans raced to the comments to praise the siblings for their uncanny resemblance to the characters in the movie.

Kylie also posted a snap of Kendall celebrating her birthday with numerous cakesCredit: Instagram/kendalljenner

The sisters teamed up for their Halloween costumes last weekCredit: Images by photographer Greg Swales

They dressed as Sugar and Spice from the classic 1995 film, Batman ForeverCredit: Images by photographer Greg Swales