The brothers, 18 and 15 respectively, are sons to billionaire publishing tycoon, Peter Brant, and supermodel Stephanie Seymour. In fact, you might even remember this incest hoo-ha from last year.
Not to worry, though. The ever-fabulous, fashionable and ridiculously dapper Peter is openly gay, and his younger brother is, well, not openly gay.
Peter II has previously described himself as a "Designer, Art Collector, Socialite and Model," but pretty well seems to spends his time flitting around the world to attend various fashion shows.
He and Harry (who we assume spends his time at Greenwich High School, where his brother graduated) have a joint Twitter account, where they post an amazing array of first-world observations about life, lunch and luxury.
So, why do you need to care?
Well, we reckon it's awesome that these two are young, unashamedly flamboyant and probably a beacon of hope for hundreds of effeminate, teenage boys.
Plus, they wear leopard-print, are adorable too boot, and they're going to be huge.
Get up to speed on all the young, up-and-comers set to take 2012 by storm in our Ones to watch gallery right here.