As David Letterman’s time as host of Late Show comes to a close, CBS announced today a limited-run concert web series ‘Legends of Letterman’ that will begin May 5 with a performance from Mumford & Sons. The webcast will be available live on CBS.com and on-demand on the website following the performance.

‘Legends on Letterman’ will celebrate the musical acts that have performed on Late Show with David Letterman over its 21-year run and will include select bands that have debuted on the broadcast as well as those that became consistent return performers. The series builds on the ‘Live on Letterman’ which has featured performances from Phish, Ryan Adams, MGMT, John Mayer and others.

Mumford & Sons, who will support their latest Wilder Mind due out May 4, made their U.S. late night television debut on Late Show in 2010. The band will also appear on Late Show on May 5 following the performance.