Blake Lively is a mom! The 27-year-old actress and her husband Ryan Reynolds welcomed their first child shortly before the New Year. The couple, who quietly married in September 2012, has not publicly commented on the birth, but sources confirmed the baby's arrival to Page Six.

No specific details have been revealed, and it's not yet known whether Lively gave birth to a boy or a girl. The former "Gossip Girl" star confirmed she was expecting in October via her lifestyle website Preserve, when she shared a photo of her then-tiny baby bump.

In August Lively told Marie Claire about her desire to start a family with Reynolds, saying, "If I could spit out a litter of kids, I would."

"We'd love to have a big family. We both come from big families - my parents did four, Blake's did five," Reynolds added. "A lot of people say it's crazy, but we'll only know when we're there, you know? We'll walk through that fire pretty happily, I think."

According to E! Online, the actress and her husband are so excited about the baby that they are reportedly already thinking about baby number two.

"They are so excited they are having a baby and are happy Blake's had a pretty easy pregnancy," a source said. "[It's been] so easy that she's saying she wants to get pregnant really soon after she pops this baby out!"