During a taping of his show Thursday in New York, David Letterman announced he is retiring in 2015.

The 66-year-old, who is the longest-serving late-night host in television history, began hosting Late Night with David Letterman in 1982 after appearing on The Tonight Show Starring Johnny Carson.

In 1993, he moved to CBS to begin hosting The Late Show with David Letterman, which he has now helmed for 21 years.

"There is only one David Letterman," said president and CEO of CBS, Leslie Moonves. " [He] has given television audiences thousands of hours of comedic entertainment, the sharpest interviews in late night…It's going to be tough to say goodbye."

Watch Dave's announcement below: