Baby Boom! All the Stars Who Became Parents This Year

Each new year brings a new crop of celebrity parents, and they'll all be spending their first holiday season with little bundles of joy. Carrie Underwood and Mike Fisher and Justin Timberlake and Jessica Biel both welcomed baby boys into their lives in 2015, while Keira Knightley and James Righton, Adam Brody and Leighton Meester, and interior designers Nate Berkus and Jeremiah Brent brought home adorable little girls. We've rounded up all the celebrities who became parents this year; scroll through to see them all now.