It looks like they may have already been granted the trademark because the logo on the Twitter and Instagram pages has the little "TM" after the name.
Kylie dropped the news on her Instagram page with this photo of herself and the caption "go ahead and follow @kendallandkylie for some sneak peeks."
In the most recent photo on that account (yes, of course we clicked over right away!) Kendall and Kylie are looking over a design sheet and they wrote "designs on the mind #decisionsdecisions."
They didn't say if the line will be part of some of their other projects (like perhaps an extension of their Kendall and Kylie clothing collection for Pacific Sunwear) or if they're going to be doing their own thing, but we do know that "Kendall + Kylie" clothes are coming!
How do we know? Because Kendall said so! When a fan tweeted Kendall a screengrab of the Kendall + Kylie page, asking "This is actually happening? Your guys clothing line?!" Kenny replied "oh it's happening!"
Here's another sneak peek from the Kendall + Kylie Instagram page.
We can't wait to see more of their stuff!
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Gallery | Kendall and Kylie Jenner: Stylish Sisters