David Letterman’s girlfriend is the mother of his only child. Her name is Regina Lasko. They have been together for more than 5 years now. Their son’s name was Harry Joseph. The relationship is going strong although they don’t have any plans of getting married.
David Letterman was married long time ago to a woman named Michelle. The marriage didn’t work out though and it ended in divorce in 1969. David Letterman’s girlfriend before Regina was Meriil Markoe, a producer of Late Night.