Hayes is the couple’s third child together, but their first boy. He joins Alba and Warren’s two daughters: Haven Garner, 6, and 9-year-old Honor Marie.
“Hayes Alba Warren 12/31/17 Best gift to ring in the New Year!!” the actress captioned a photo of her little man. “Cash and I feel so blessed. Haven and Honor are already obsessed with their new baby bro. #familyof5.”
Not long after Alba’s post, Warren shared one of his own. It featured an adorable photo of him looking down at his newborn baby son with a sweet caption.
“Hayes Alba Warren: You sure know how to ring in the new year! You showed up a few days early but we couldn’t be any happier.”
“Your Mamma is the strongest woman I know … you’re so lucky to have her by your side,” he added. “You have two amazing sisters who already adore you and I know you’ll be thankful to have them guide the way.”
He concluded: “On your first day of life, I promise to love you, to cherish you, and to provide you with a sandbox full of dreams to explore. Welcome to the family my sweet baby Hayes! 12/31/2017.”