The Britain's Got Talent judge announced her happy news on her 35th birthday this morning (7 October), revealing she'd actually welcomed daughter Azura Sienna last week but had kept the birth a secret.
It's her first child with long-time dancer boyfriend Azuka Ononye.
New mum Alesha wrote: "Thank you for all your lovely birthday messages! I've had the best present in the world. My baby girl Azura Sienna was born last week! I'm elated and over the moon."
Alesha later added: "It seems quick because I was hiding it for so long! I was in my sixth month of pregnancy at the Britain's Got Talent final!"
The 'Lipstick' singer has kept away from the limelight during her pregnancy so the fact she kept the baby's birth a secret for a week isn't too much of a surprise.
In fact, the last time we saw her making a public appearance was back in July when she helped open a new gym in London, looking radiant in yellow!
Announcing her pregnancy in June, a rep for Alesha said: "Alesha Dixon and her partner Azuka Ononye are delighted to announce that they are expecting their first child later this year. Alesha and Azuka are looking forward to this happy chapter in their lives and would request privacy to enjoy this happy and most important event.
Alesha is said to have been dating Azuka for several years, however she has managed to keep her relationship secret and away from the public eye.
She was previously married to So Solid rapper MC Harvey. They split in 2006.
Congrats to Alesha and Azuka!
More stars who have welcomed babies in 2013 below!
Copyright: Love & Lust London