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Kendall Jenner Has Changed A Lot Since The First 'KUWTK'

The first season of "Keeping Up With The Kardashians" aired way back in October 2007.

Do you remember 2007? What a different time that was, right?

George W. Bush was still our president, "Shrek the Third" came out, the housing bubble burst...

Personally, I was one month into college, wide-eyed, bushy-tailed and trying to find some upperclassman to buy us alcohol so we could get tipsy and watch... the first episode of "KUWTK."

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If I knew then what I knew now... I'd know which restaurants will let you order alcohol "to go" without checking IDs and that Kendall Jenner is a supermodel.

In honor of Kendall's 21st birthday, I just want to reminisce about all the time we've spent together.

Rob was FIT, Kim was Queen, and Kylie and Kendall were the "little sisters."

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Kendall, just 12 when the show first aired, was always more of the shy sibling, letting Kylie crack jokes as the baby of the fam.

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She had braces. #Relatable.

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The now model could not even sit through a conversation about periods.

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I still own these shoes. They're classics, right? It's fine.

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Somewhere around 2010 she HIT A GROWTH SPURT.

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By 2011, she seemingly grew up before our very eyes and was already starting her modeling career.

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She walked in her first huge fashion show, the Spring 2012 Mercedes-Benz Fashion Week in New York.

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In 2014, she truly became a staple of New York Fashion Week and attended her first Met Gala in this stunning dress.

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She has certainly come a long way from the shy girl with braces.

If only everyone's puberty was just this kind.

You've certainly come a long way from bad haircuts, but those Adidas tracksuits are still on point.

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Happy birthday, Kendall!

Hopefully you're still not weird about tampons and stuff? It's totally normal.