David Letterman will be making a guest appearance on Stephen Colbert's Late Show after eight years of not appearing on his old stomping grounds. While the reason for his appearance is unknown, it has been about a year since Letterman's last Netflix series, so it could be related. This will be the first time in several years that Colbert and Letterman will publicly sit down and talk to each other. #tv #instagram #funny #celebs #art #youtube #podcasts #tiktok