Kendall Jenner is baring her barely-legal breasts in the classiest way possible: At New York Fashion Week!

The 18-year-old hit the runway on Thursday for the Marc Jacobs runway show, strutting her stuff on the catwalk in a sheer tan top and nothing underneath.

She also sported a bob with blunt bangs and bleached eyebrows.

Older sister Khloe Kardashian took to Twitter to show how proud she was of Kendall for walking in such a high-profile show -- but she got a lot of negative feedback after sharing a photo of what Jenner was actually wearing.

In typical Khloe style, she then stood up for her lil sis and her risque fashion moment.

Congrats to Kendall for the impressive gig -- but what do you think of the extremely revealing look? Sound off below!

And check out video of her from the runway here:

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