Late night hosts Jimmy Fallon and Conan O'Brien have already paid tribute to the late comedian Robin Williams, a man who was an inspiration to them both, making his mark as the best late night talk show guest ever.
Now the more seasoned David Letterman has stepped up, taking a week to gather his thoughts, with an extended tribute from "The Late Show" on CBS the program that he will be leaving behind at the end of the year.
It's a heartfelt tribute from a man who is a comedy legend in his own right, and spent some wild and wacky time with Williams at the Ed Sullivan Theater in New York City over the years.Watch!