Vince Gill and Amy Grant will be married March 10 at a location yet to be disclosed. A spokewsoman for Grant confirmed the nuptials and their date, first revealed Tuesday by WSMV-TV (Channel 4), NBC's Nashville affiliate. Grant was divorced last year from Gary Chapman, former host of TNN's defunct Prime Time Country. Gill was divorced in 1997 from Janis Gill, a member of the sister act Sweethearts of the Rodeo. Chapman has announced plans to marry Jennifer Pittman, 30, an animal trainer for Universal Studios.