Katherine welcomed her daughter into the world with husband Andrew Levitas earlier today (Wednesday 30 September).
The new mum took to social media to announce her baby's arrival and sharing a photo of her newborn's teeny-tiny feet, Katherine gushed she and Andrew are already totally "besotted".
Showing off sweet snaps of her daughter, Katherine told fans: "Introducing our daughter Aaliyah Reign Levitas, who came loudly into the world weighing almost 7lbs and surrounded by love.
"We are absolutely besotted with her & grateful for the beautiful blessing of this happy, healthy, little miracle. Cwtches all round @AndrewLevitas."
Andrew shared the same post to his own Instagram feed.
The couple had first announced they were starting a family together back in April, earlier this year. Revealing her pregnancy, Katherine also chose to tell fans she was expecting her very own mini-me too.
Announcing she was expecting her daughter, the opera singer shared a photo of a pair of a-dorable pink baby shoes sitting on a wedding photograph of herself and her husband. Alongside her pregnancy post, she said: "Couldn't be more excited to meet our little girl! #MummyToBe #DaddyToBe #ArtProject #Collaboration #Family @andrewlevitas."
Aaliyah is the starlet and Andrew's first child together. Their baby joy comes a little over a year after Katherine and her film director beau tied the knot.
The pair wed in September 2014, five months after Andrew popped the question to Katherine while holidaying in The Hamptons, New York.
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!