First came Kylie Jenners's sold-out lip kits, which quickly expanded into the full-blown Kylie Cosmetics line. Then came Kim Kardashian's highly anticipated KKW Beauty collection. Now, according to recent trademark applications, it looks like their sisters Kourtney and Khloé are looking to launch makeup brands of their own.

Considering Kylie's business is projected to make $1 billion by 2022 and Kim made $10 million in just a single day of sales for her fragrance, who could blame them? It's not like they're totally new to the beauty business, either — both sisters were originally part of Kardashian Beauty, which they launched with Kim back in 2013.

Rumors of Kourtney's individual beauty line started first when TMZ reported on January 17 that she filed legal documents to own the name "Kourt" under her company 2Die4Kourt. It reportedly outlined Kourt will be a cosmetics business, but provided no further info on what, exactly, she'll be selling. Kourtney seemingly dropped a hint at what the logo will look like in a recent snap:

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On January 22, TMZ found out Khloé also applied for a couple different beauty company trademarks, "KOKO Kollection by Khloé Kardashian" and "KOKO Kollection." There are no further details on what she might have coming up — though she has dabbled in the lip department on a collaboration for Kylie Cosmetics.

Applying for a trademark is hardly a confirmation something solid is actually in the works (Rihanna's Fenty Beauty, for example, was registered for a trademark in 2014 but didn't launch until 2017). That being said, expect the Kardashians to treat this venture the way they do magazine covers, fashion campaigns, and heck, even pregnancies: a family affair.