August 18, 2014 9:25pm PT by Aaron Couch
David Letterman Honors Robin Williams With Moving Tribute
David Letterman used Monday's The Late Show to pay tribute to Robin Williams.
Letterman showed clips from Williams' appearances on his show, saying he'd been friends with Williams for 38 years. Among the clips The Late Show trotted out: a young Letterman's cameo on Mork & Mindy.
"What I will add here is that, beyond being a very talented man and a good friend and a gentleman, I am sorry I, like everybody else, had no idea that the man was in pain and the man was suffering," Letterman said.
Letterman's show was on break last week when Williams died, so this was his first episode to address his friend's passing. Conan O'Brien, Jimmy Fallon and Seth Meyers all honored Williams in tributes of their own last week.