"He made us laugh. Hard," Billy said after taking the stage. "I spent many happy hours with Robin onstage. The brilliance was astounding. The relentless energy was thrilling. I used to think that if I could just put a saddle on him and stay on for eight seconds, I was going to do okay."
"As genius as he was on stage, he was the greatest friend you could ever imagine," he continued. "Supportive. Protective. Loving. It's very hard to talk about him in the past because he was so present in all of our lives. For almost 40 years, he was the brightest star in the comedy galaxy. [His] beautiful light will continue to shine on us forever. And the glow will be so bright, it'll warm your heart. It'll make your eyes glisten. And you'll think to yourselves: Robin Williams. What a concept."
After a moment of silence, clips of Robin's first performance on the Tonight Show in 1981, along with several other clips of more of his performances were played.
The tribute came after the show's In Memoriam tribute, which opened with Sara Bareilles singing a beautiful version of Charlie Chaplin's "Smile." Maya Angelou, Philip Seymour Hoffman and Paul Walker were just a few of the celebs that were honored.
Robin was found dead in the bedroom of his Tiburon, Calif. home earlier this month after hanging himself. His widow, Susan Schneider, later revealed that the actor not only suffered from depression and anxiety, but also was in the early stages of Parkinson's Disease.