The proud mama posted an adorable Instagram pic of her and a beaming Baldwin cradling their newest son. The couple has just welcomed the latest addition to their family. "8lbs 2oz", wrote the 34-year-old, including the hashtag "#wegotthis2018".
The Baldwins revealed their baby's gender in an Instagram video in November.
Hilaria later told US Weekly that she was "in shock" to discover she was expecting another boy.
The newborn will join his siblings Leonardo Ángel Charles, 20 months, Rafael Thomas, 2½, and Carmen Gabriela, 4½.
'I cried when I found out! "I really do believe that this baby was meant to be and will come and we'll be completely obsessed with him". They have yet to reveal the name of their newborn.
The actor Wednesday yoga instructor and TV presenter Hilaria in 2012 after meeting her at NY restaurant Pure Food and Wine in 2011, when Alec walked up to her and handed her his business card.
Late a year ago, Hilaria opened up to People about her growing family.