From Their Wikipedia Page:
Lady Antebellum was formed in 2006 in Nashville, Tennessee by Charles Kelley, Dave Haywood and Hillary Scott. Scott is the daughter of country music singer Linda Davis, and Charles Kelley is the brother of pop artist Josh Kelley.
Charles moved to Nashville in mid-2005 from Winston-Salem, North Carolina, where he had been working construction with his brother John. Trying to become a successful solo country artist, Charles convinced his old middle-school classmate, Haywood, to move to Nashville from Georgia in 2006 so they could write music together. Shortly thereafter, Kelley recognized Scott from the networking site Myspace, and they started to talk at a Nashville music club and invited Scott to join him and Haywood in the new group, which assumed the name Lady Antebellum. The trio then began performing at local venues in Nashville before being signed in July 2007 to a recording contract with Capitol Records Nashville.