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The pair, who married in 2012, kept news Lively's pregnancy quiet and only announced their happy news following her adorable baby shower in October. While it was never clear when her due date official was, Us Weekly reports their little one arrived earlier than expected.
"The baby came early but everyone is happy and healthy," a source told Us Weekly. "The Bedford house is all prepared. They're going to stay up there for the baby's first days."
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While there's no word on the name of their late December baby — or a gender for that matter! — we do know that both Reynolds and Lively have been anxiously anticipating the birth of their child.
Reynolds told People that he couldn't wait to spend time with their baby. "I'm just excited about having a buddy," Reynolds said. "For a lot of new dads, you tend to dwell on the mistakes you don't want to make. I'm at that stage still where I'm focused primarily on being open and understanding and leaving a lot of room for error."
Lively felt similarly, telling Us Weekly in October that it's always been her goal to start a family. "I knew I wanted to have a lot of kids because I have come from a big family so it was always important to me."
One thing is for sure: We can't wait to see a photo of this undoubtedly gorgeous baby!