She's following in her big sisters' footsteps!

Kylie Jenner is just 16-years-old, but that's not stopping her from showing off her enviable bod on Instagram!

The teenage reality star donned her skimpiest bikini and posed with two gal pals in a black and white snapshot, and it's pretty noticeable that she has inherited the famous booty gene!

"Luvs," she captioned the pic.

Who needs high school when you can do this all day instead?!