"I knew we were sisters @caradelevingne #CaKe," Kendall captioned the photo, which Cara also posted with "sisters" and a heart. In case you were wondering, "CaKe" is the moniker the pals gave themselves, which is the first two letters of each of their names.
We hadn't realized how much they looked alike until we saw this photo, but it's kinda crazy, isn't it? They could be sisters!
And don't worry, Kendall's biological sisters are cool with Cara, too, so there is no Kardashian competition. In fact, Khloe Kardashian shared this photo of the three of them together at a basketball game and pretty much made Cara an honorary Kardashian...if she changed her name to Cara with a "K," of course.