By Kelsey Glein
Updated: Aug 18, 2016 @ 3:22 pm
Frazer Harrison/Getty Images

After last week's parade of swimsuits, Kylie Jenner is going ultra glam.

The Keeping Up with the Kardashians star took to Instagram today to share a photo of herself looking slimmer than ever in a sexy black Balmain bustier dress, and we can't get over how tiny her waist is. In the 'gram, the 19-year-old stands in an alleyway wearing the strapless number while she chows down on an apple. She styled her long locks down in loose waves for the snap, and added a pretty pink lip color. The beauty mogul posted the image without a caption.

A photo posted by King Kylie (@kyliejenner) on

Jenner also posted another image of herself in the look that features her with her bestie Jordyn Woods, who also dons a pretty black ensemble. "With @jordynwoods on set," she wrote alongside the photo.

With @jordynwoods on set ⭐️

A photo posted by King Kylie (@kyliejenner) on

The bombshell celebrated her 19th birthday last week with family and friends on a bikini-filled trip to Turks and Caicos.

RELATED: Kylie Jenner Continues Her Tropical Getaway in a Barely-There Peach Bikini

One thing's certain: an apple a day is definitely doing Jenner's body good.