Emmylou Harris, Ralph Stanley Will Be among David Letterman’s Final Musical Guest’s

(AP) - Elvis Costello, the Dave Matthews Band and Norah Jones will be among the final musical acts on Late Show with David Letterman.

Letterman is retiring next month. Other acts who will appear on his last shows include Emmylou Harris, The Avett Brothers with Brandi Carlile, Mumford and Sons, Ralph Stanley and Amos Lee. More will be announced.

Musical guests this week include Chris Stapleton, Iron and Wine, Tracy Chapman and John Mayer.

• Johnny Cash And Waylon Jennings With David Letterman

Letterman's final show is May 20. He has not said who his final guests will be, if he has any.

Emmylou has made numerous appearances on the Late Show, including the one below.