Catelynn Lowell and Tyler Baltierra! The star and her husband have welcomed the newest member of their family, a baby girl.The couple shared the exciting news on their social media on Saturday. The mom-of-four posted a black-and-white photo of their little bundle of joy wrapped up in a blanket in the hospital bassinet.«Our baby has arrived! ❤️» Lowell, 29, captioned her photo.