NEW YORK, NY - SEPTEMBER 16: Kim Kardashian West and North West are seen walking in Soho on September 16, 2015 in New York Ci
Raymond Hall/GC Images

Tomorrow marks the one-month birthday of Kim Kardashian and Kanye West's second child, Saint West. While an all-out photo of the baby boy has yet to be revealed—wait for the magazine cover, people—Kim teased celebrity-baby-fanatics everywhere with a new pic on Instagram.

On Sunday, Jan. 3, she shared the pic, below, of Saint holding his 2-and-a-half-year-old sister's finger. North West—a.k.a. Nori—evidently said "He's my best friend," which is just good siblingship:

Kim Kardashian (@kimkardashian on Instagram)

Back in November, Kim told People mag that Nori's idea for Saint's name was simply Baby Brother.

In parentally related news, Kanye dropped a new song called "FACTS" on New Year's Eve. Yeezy opted not to throw in any Saint references, instead pushing the message that he'd just outdone Drake and Future's "Jumpman."