Joy Williams and her husband Nate Yetton welcomed a son, Miles Alexander, on Saturday (June 30) in Nashville. She made the announcement on Twitter. "Now I really know what love at first sight means after meeting my son, Miles Alexander," she wrote. "Born yesterday, all happy and healthy. xo" Williams' partner in the Civil Wars is John Paul White. The duo's music videos include "Poison and Wine," "Barton Hollow" and "Safe & Sound" with Taylor Swift.