The KKW Beauty mogul appropriately captioned the image — which appeared to be of a purple shirt with the word “Chicago” written on it in cursive font — with a baby emoji.
The couple’s newest addition was born Jan. 15 at 12:47 a.m., weighing 7 lbs., 6 oz., Kardashian West revealed on her website and app Tuesday.
And just a few days later, also on her app and website, the reality star broke with tradition and revealed their newborn daughter is named Chicago.
The 37-year-old third-time new mother also posted a tweet that gave a sweet shout-out to her and West’s older children: son Saint, 2, and daughter North, 4½.
“North, Saint & Chi,” she wrote, while also retweeting a post that cleared up any lingering questions fans had on how to say the newborn’s nickname: “And to everyone who thinks it’s literally pronounced as CHI. No. It’s ‘Shy.’ ”
This article originally appeared on PEOPLE