Actors Jessica Alba and Cash Warren are officially outnumbered — and loving it. The couple, who has been married for nine years, celebrated the arrival of their first son on New Year's Eve. Nice timing! He'll never have trouble finding a party on Dec. 31.

The little guy joins sisters Haven, 6, and Honor, 9, and sports an H name of his own: Hayes Alba Warren. Papa Cash Warren posted a very sweet welcome to Hayes — and a tribute to Alba — on Instagram.

“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," Warren captioned a pic of himself with his newborn son. "You’re so lucky to have her by your side. You have two amazing sisters who already adore you and I know you’ll be thankful to have them guide the way.”

Mama Alba also posted on social media about their New Year's surprise.

“Hayes Alba Warren 12/31/17 Best gift to ring in the New Year!! Cash and I feel so blessed. Haven and Honor are already obsessed with their new baby bro. #familyof5,” she wrote.

Alba recently posted a holiday shot of the family just before Hayes made his grand appearance, writing, "...our last Christmas as a family of four! Feeling so blessed and can’t wait to meet our baby boy. Thankful for our beautiful family that celebrated with us today - our smallest family gathering we’ve had in our 14 years together but it was perfect..."

Yep, those are matching red PJs by the fireplace as well as stripy hats and socks. Tell us again why our Christmas cards never look this good? Oh, right, because we keep forgetting to hire a stylist. Maybe next year.