L. W. Miller III (born July 20, 1973) is an American professional stock car racing driver. He is a member of the Earnhardt family, as the husband of Kelley Earnhardt Miller. Miller is the 2008 NASCAR Whelen Southern Modified Tour champion and competed in that series full-time from 2006 to 2011 and part-time in 2012. He has also competed part-time in what is now the NASCAR Xfinity Series, the NASCAR Truck Series, what is now the ARCA Menards Series, what is now the ARCA Menards Series East, and the NASCAR Whelen Modified Tour in the past.