We've dug up a few old photos, as well as plenty of new ones to compare the Kardashians of yesteryear to the versions we know and love today.
Keep scrolling for all the photos and to see how much some of the reality stars (looking at you, Khloe and Kylie) have changed.
The Kardashian family: Then vs now
Kim Kardashian
Back then she was known as one of Paris Hilton's friends - now Kim is a multi-millionaire businesswoman, mother and ex-wife to Kanye West (she's now dating Pete Davidson). She's also changed her look dramatically and been setting trends for well over a decade.
Kourtney Kardashian
KUWTK documented Kourtney's early years as a mum with ex Scott Disick - now she's married to Blink-182 drummer Travis Barker and living large as one of the key players in the Kardashian empire.
Khloe Kardashian
Khloe has had one of the biggest transformations, going from being called the "ugly sister" (her words!) to a blonde bombshell with the ultimate 'revenge body'. That said, she's had her fair share of controversy surrounding her transformation - read about it here.
Kylie Jenner
Kylie, Kylie, Kylie. We saw her go from an adorable kid to one of the biggest Instagram personalities on the planet, also becoming a mum of two in the process and fending off constant plastic surgery rumours. With her own makeup and skincare lines, she's one of the most successful Kar-Jenners to date.
Kendall Jenner
From an awkward kid to an international model, Kendall has certainly come into her own in the years since she first appeared on KUWTK. Now walking runways and posing for the covers of glamorous magazines, she insists it was hard work that got her there, not her family name.
Kris Jenner
There's a popular saying that goes, "The devil works hard, but Kris Jenner works harder." This iconic 'momager' turned her family life into one of the biggest media empires in the world and has kept herself looking good while doing it.
Caitlyn Jenner
Caitlyn may have had one of the most dramatic makeovers in the family after coming out as a transgender woman in 2015 and undergoing a number of feminisation surgeries. She no longer appears in most Kardashian content and is said to have a strained relationship with the clan.
Robert Kardashian
He may not be the most famous Kardashian, but Rob has had his own little transformation since KUWTK kicked off in 2007, though he stopped appearing on the show in its final seasons.
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