The 17-year-old Keeping Up With the Kardashians star showcased her cleavage and ice blue hair in the Instagram post, and let her emojis do the talking in the caption.
However, Kylie made no mention that Kendall was the first Jenner sister to wear the look. In the March issue of Allure magazine, the 19-year-old model posed in the Agent Provocateur Dakotta Swimsuit, which retails for $450.
"Me and my lil monkey inside my @Allure_Magazine cover shoot," Kendall captioned the photo taken by Mario Testino.
This isn't the first time Kylie has copied one of her sisters' styles. While in Cannes, France this past month, Kylie donned a gown that looked strikingly similar to Kim Kardashian's Met Gala getup. Check it out: