The 'Girl On Fire' singer, 34, shared a stunning snap of her happy family, including the two-month-old tot.
In the black and white photograph, proud mum Alicia is gazing lovingly down at her youngest child.
Husband Kasseem Dean - aka hip hop artist Swizz Beatz - is also staring adoringly at the baby, while Alicia's eldest son Egypt smiles on. Kasseem's son from a previous relationship Kasseem Jnr also features in the striking snap.
Alongside the intimate family portrait, Alicia simply wrote: "Blessings and love!! #GenesisAliDean."
She also told fans that Genesis has his own Instagram account, where another gorgeous photo had been posted.
In this one - captioned "The Dean Boys" - dad Kasseem is holding tiny Genesis in his hands as his older brothers sit beside him - awwww!
Alicia announced the birth of Genesis on 27 December 2014 with a cute snap of her newborn's footprints and the message: "The joy of joy is joy!! It's a boy!! We are so grateful!! #blessings!!"
In May 2010, a representative for Alicia and Kasseem confirmed they were engaged and expecting their first child together.
They married on the French island of Corsica in July 2010, and welcomed their first son together in October of that same year.
LAST CHANCE to win £50 for best comment of the week across the website! See details and terms and conditions here.
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!