My little turtle dove angel baby boy Reign Aston Disick.

A photo posted by Kourtney Kardashian (@kourtneykardash) on Apr 2, 2015 at 10:00am PDT

Reign-ing in our hearts! Though Kourtney Kardashian gave birth to her third child on Dec. 14, 2014, the reality star, 35, didn’t share a picture of the tiny tot until Thursday, April 2. 

“My little turtle dove angel baby boy Reign Aston Disick,” she captioned the Instagram shot of her second-born son in a light grey bundl onesie.

Reign was born on the fifth birthday of Kardashian and Scott Disick’s first son Mason. The couple also shares daughter Penelope, 2. 

Apart from one photo of the youngest in the Kardashian clan’s hand, captioned, “Madly in love with my little Reign Aston Disick,” Kris Jenner’s eldest daughter has not let her 15.3 million Instagram followers see the cutie until now. 

Grandma Jenner quickly reposted her daughter's Instagram, writing, "Meet my beautiful grandson!!!! #blessed #oneofthelovesofmylife."

Tell Us: Does Reign look more like Kourtney or Scott?