The couple have now officially introduced their son to the World as well as his name.
Hilaria and Alec Baldwin took to their respective Instagram account to share a similar photo of their son, and revealed they have named him, Eduardo Pau Lucas.
The Spanish-born beauty and the 62-year-old Hunt For Red October actor already have daughter Carmen, seven, and sons Rafael, five, Leonardo, three, and Romeo, two.
Alec is also a father to daughter Ireland, 24, whom he shares with ex-wife Kim Basinger.