Hollywood and comedy fans alike were shocked Monday (Aug. 11) when news broke of Robin Williams’ death. The beloved comedian and Academy Award-winning actor touched many lives, and his suspected suicide hit fans hard.

His friends and co-stars have been paying tribute to the late comedic genius, mostly on Twitter — though the above video is from Conan O’Brien, learning about Williams’ death while he taped his Monday night show. It is poignant and sad to hear the shocked reactions of audience members who hadn’t heard the news until right at that moment.

Rest in peace, Robin Williams. You will be sorely missed.