"I met him at the Comedy Store [in Los Angeles]. He and I were kids, we wanted to make people laugh," Letterman explained. "
"In those days we were working for free drinks. It wasn't until I started the NBC version of this show, it wasn't until then that I sort of got to really know Robin Williams. He would come on to promote movies, or concerts, or whatever he was talking about, and he was always so gracious and we would talk about the old times. It was just a pleasure to know the guy. He was a gentleman and delightful."
The late actor appeared on Letterman's show 50 times throughout his extremely successful career, and every time Williams stopped by the two pals never missed a beat.
"Really that's what we should take from this, he could make you laugh under any circumstances," Letterman explained, referring to the "Mrs. Doubtfire" star's passing.
"Well, what I will add here is, beyond being a very talented man, and a good friend, and a gentleman, I'm sorry, like everybody else, I had no idea that the man was in pain, that the man was suffering. What a guy, Robin Williams," an emotional David concluded.