Late-night U.S. TV legend David Letterman has announced his retirement. The Late Show host will vacate the Ed Sullivan Theater stage in New York City next year (15). Letterman made his announcement while taping his Thursday night (03Apr14) show, according to guest musician Mike Mills. It is not known who will replace the beloved TV personality. Letterman has hosted The Late Show for over two decades. Responding to the news, fellow late-night host Jimmy Kimmel tweets, "David Letterman is the best there is and ever was."