Baby Boom! All the Stars Who Became Parents This Year

Carrie Underwood and Mike Fisher became parents for the first time when they welcomed son Isaiah in March.

Jessica Biel gave birth to her first child with husband Justin Timberlake in April, a baby boy they named Silas.

Keira Knightley and her husband, British musician James Righton, welcomed their daughter Edie in May.

Benedict Cumberbatch's wife Sophie Hunter gave birth to their son, Christopher, in June.

Aussie model Lara Bingle welcomed a baby boy in March — she and Sam Worthington named the little one Rocket Zot.

Interior designers Nate Berkus and Jeremiah Brent became fathers when their daughter, Poppy, was born in March.

In October, Carey Mulligan and Marcus Mumford became parents when their daughter Evelyn was born.

Adam Brody and Leighton Meester welcomed their daughter, Arlo Day, in August.

Naya Rivera and Ryan Dorsey welcomed their son Josey in September.

Lucy Liu welcomed her first child, son Rockwell Lloyd Liu, via surrogate in August.

In November, Lauren Bush gave birth to her first child, son James, with David Lauren, the current executive vice president of Ralph Lauren Corporation.

Macklemore and his fiancée, Tricia Davis, became parents in May when their daughter Sloane was born.

Bethany Hamilton and Adam Dirks became a family of three when their son Tobias was born in June.

Josh Hartnett and Tamsin Egerton welcomed their first child in late November. The baby, whose gender has yet to be revealed, was born in London.

Brooklyn Decker and Andy Roddick became parents in September when the model and actress gave birth to their son, Hank.

Zooey Deschanel gave birth to daughter Elsie Otter in July — she is the first child for Zooey and her husband, Jacob Pechenik, who tied the knot secretly around the same time as Elsie's birth.

Haylie Duff and husband Matt Rosenberg welcomed their adorable daughter Ryan in May.

Model Coco Rocha gave birth to her daughter, Ioni James Conran, in March. It's the first child for Coco and her husband, fashion photographer James Conran.

Former Mad Men star Jessica Paré gave birth to a son, Blues Anthony Paré Kastner, with her boyfriend John Kastner in March.

Casey Wilson and her husband, comedy writer David Caspe, welcomed their son Max in May.

Brandon and Leah Jenner became first-time parents when their daughter Eva was born in July.

Dave and Odette Annable welcomed their daughter, Charlie, in September.

Joseph Gordon-Levitt and Tasha McCauley welcomed a baby boy in August, though his name has not been revealed.

Chad Michael Murray and Sarah Roemer welcomed their first child, a baby boy, in May.

In June, Sons of Anarchy star Theo Rossi and his wife, Meghan McDermott, welcomed their son Kane Alexander Rossi.

Jane the Virgin star Justin Baldoni and his wife, Emily, welcomed their first child, a daughter they named Maiya Grace, at their home in June.