Lauren's mother, Caroline Manzo, followed up her daughter's Instagram post by sharing another photo of the baby.
"Welcome to the world Marchesa Anna Scalia, our little Markie! Mommy and daughter are resting comfortably," the Real Housewives of New Jersey alum wrote next to a snapshot of Markie sleeping in Lauren’s arms. "'Grandma Caroline' loves you both beyond measure!"
Caroline has been "patiently" anticipating the arrival of her first grandchild, and it looks like she came ahead of schedule. On Monday, Caroline Instagrammed a photo of a then pregnant Lauren which she captioned, “One week from today - waiting patiently for this one to call and say it's time."
Lauren and Vito confirmed that they were expecting in an exclusive statement to ET last September.
"We are thrilled to announce that we are expecting our first child early next year," the couple told ET. "You will see our journey on this season of Manzo'd With Children, which we are so happy we get to share with everyone. Stay tuned on the gender! We can't wait to find out."