"Welcome Cameron Hendrix Malleo! Born at 5:20pm! 8 lbs 4 oz 20 inches 8/30/2016," she captioned a photo of the infant with his dad, Holmes' fiance Pete Malleo.
"Thank you everybody for your beautiful well wishes! We are so in love with that beautiful baby boy! #CameronHendrix," she later wrote to her 916,000 Twitter followers.
Bravo also shared a family home video on "The Daily Dish" of Malleo holding his son. Laurita had confirmed in March that she was going to become a "glamma."
"I think I'm the first New Jersey housewife to become a glamma," she told "The Daily Dish" in July. "I am so excited. I keep saying my tubes are cut, tied, and burnt, so I'm using [Ashlee's] uterus now."
"She's [also] planning a wedding," the star added of her daughter. "I believe the wedding is next year. They didn't want to change the date because of the baby, so they're gonna keep the same date."
Laurita is also mom to two sons, 14-year-old Christopher and 7-year-old Nicholas. She has appeared on all seven seasons of "The Real Housewives of New Jersey," which airs Mondays at 10 p.m. ET.
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