Kourtney Kardashian posted the first public pic of her third child, Reign Aston, to Instagram on Thursday. (In the Kardashian klan, you don't really exist until you've been Instagrammed.)
Reign joined older brother Mason, 5, and sister Penelope, 2, late last year. Reign was born on Mason's 5th birthday -- Dec.14. Parents Kourtney Kardashian and Scott Disick have been together since 2006.
Watch Aisha Tyler do impressions of her favorite emoji: