Reality TV star Kourtney Kardashian, who delivered her third child in December 2014, has shared an image of her newborn son Reign Aston Disick with the world.

She gave the first look at her baby on image-sharing website Instagram, roughly three months after giving birth to her bundle of joy, reports aceshowbiz.com.

"My little turtle dove angel baby boy Reign Aston Disick," Kourtney captioned the photograph that showed baby Reign in a white onesie lying on a white fur rug.

"Meet my beautiful grandson!!!! #blessed #oneofthelovesofmylife," Kris Jenner wrote alongside the image.

Reign is Kourtney's third child with partner Scott Disick, bringing their family to a total five. The baby joins elder brother Mason, and elder sister Penelope.