 Dorothy Mengering

Dorothy Marie Mengering (née Hofert, formerly Letterman; July 18, 1921 – April 11, 2017), better known to "Late Night" and "Late Show" viewers as Dave's Mom, was the mother of late-night talk show host David Letterman and frequent telephone and live guest on his show.She appeared on camera (identified as Dorothy Mengering) on "Late Night with David Letterman" on the "Parents' Night" broadcast of February 25, 1986, in which the parents of many "Late Night" staffers were also seen.