The 18-year-old model shocked fans on Tuesday (19Nov13) after she shared a snap from a recent shoot in which she bares her breasts.
In the black and white portrait, Jenner's hair is soaking wet and she is wearing a tight, knitted sweater, exposing her nipples.
Along with the photo, she wrote, "Sneak peak of today's shoot with the amazing (photographer Russell James) ... can't wait for you guys to see the rest of the photos!"
The photo prompted a backlash against the the reality Tv teen online, with critics slamming Jenner for showing too much at such a young age.
However, Jenner's half-sister Kardashian begged to differ and took to Twitter.com to sing the up-and-coming model's praises.
She wrote, "Gorgeous KendallJenner!!! High fashion! Model your booty off and show them how it's done!!! Major Model Moment!"
Kardashian added, "I love seeing all of these haters' comments. Naomi (Campbell), Kate (Moss), Cindy (Crawford), all fabulous models. Models and photographers take beautiful artistic images. And I don't hear you birds chirp then. Sit down and enjoy the view! Sorry Not Sorry."