News of the announcement, which will air Thursday night, was first tweeted by R.E.M. bassist Mike Mills, who is one of tonight's musical guests.
Dave just announced his retirement #2015 #muchlovedave
— Mike Mills (@m_millsey) April 3, 2014
CNN, Variety, and CBS News later confirmed the announcement. Letterman has hosted the Late Show With David Letterman on CBS since August 30, 1993; before moving to CBS, he hosted Late Night on NBC for more than ten years.
[Image via AP]