So, of course, on Thursday, the ladies decided to share a few more gems from back in the day with their fans.
Khloé Kardashian went first, posting a rather epic photo of her and Kendall Jenner wearing full animal print back in the day on her website and app.
Kris Jenner, never one to be outdone, decided to post her own #TBT, sharing an adorable picture of her, Kourtney Kardashian and Kim Kardashian West in Vail, Colorado, years ago – splitting it with a photo of her granddaughters North, 2, and Penelope, 3, in Vail together this week on the family's ski trip.
"Family vacations in Vail, then and now... Three generations!! #TBT #soblessed #family #love," she captioned the post.
The family has been big on reminiscing this week – on Wednesday, Kris, 60, posted an old picture of daughter Kylie Jenner, now 18, writing: "My little @kyliejenner!! Feels like just yesterday!! #wheredoesthetimego #proudmama #familytime."
The picture was originally posted on Kylie's Snapchat as the crew was going through old family photos.
Kendall, 20, also got in on the nostalgia fun, Snapchatting videos of her and Khloé watching old episodes of Keeping Up with the Kardashians while filming for the upcoming season.
"Watching old episodes of Keeping Up while filming new episodes of Keeping Up," the supermodel says in one video. "Ten years later!"
She also posted an old picture of her and Kylie sporting head-to-toe Adidas outfits and a couple of hilarious hairstyles.
"Whyyyyy mom?!" she jokingly captioned the post.
"I guess Kylie and I have always been trendsetters, haha," she added on her website and app. "My mom used to always put us in matching outfits when we were younger and these full Adidas baby getups are pretty dope. Also, I've been a devoted white sneaker fan for longer than I even imagined! Seriously, I would still wear this outfit today. Too cute."