It seems like just yesterday that Kendall and Kylie Jenner were just two skinny, goofy kids on the first season of Keeping Up With the Kardashians, instead of the billionaire, private-jet owning, entrepreneurial models they are today. Kendall Jenner was kind enough to remind us all of those early, simpler days with a series of adorable throwback pH๏τos of the two sisters for Kylie’s birthday.Kendall Jenner Posted Throwback PH๏τos For Kylie's Birthday | Glamour UK

Posting to her Instagram Stories, Kendall uploaded pics of the two as little girls in matching cheerleading outfits, pausing for hugs on sunny days, mean mugging, and posing on the red carpet. Over a pH๏τo of Kendall and Kylie making goofy faces at the camera, she wrote, “This is the Kylie Jenner that I know.” And she captioned a picture of the two of them dressed up for the red carpet with, “absolutely crushing it in 2004.” It’s all very sweet and adorable. Almost enough to make us forget Kylie’s “mine or yours” PJ faux pas.Kris Jenner on Kendall and Kylie Jenner's Homeschooling Experience

Kylie also posted her own series of throwback birthday pics—uploading a carousel of snapsH๏τs from her very first birthday in 1998. “August 10th 1998 🦋 my 1st birthday party,” she wrote in the caption. Kylie’s pics show the future lip-kit mogul in diapers surrounded by balloons, with a Tweety Bird cake and paper decorations. Yeah, this is much more relatable content.12 questions we had about Kendall Jenner's 21st birthday - Grazia

Kylie’s sister Kim Kardashian also posted a birthday message, writing in her Instagram caption, “Every year you amaze me at how wise, protective of your loved ones and just how generous your heart is.” They may be the least relatable family in the world, but they are definitely a family full of love.