During a taping of his late night talk show Monday, Conan O'Brien broke the news of Robin Williams' passing to a stunned audience.
"This is absolutely shocking and horrifying and upsetting on every level," a shaken and visibly emotional O'Brien said. "We are absolutely stunned to get this news."
Guests Will Arnett and Andy Richter, who have also worked with Williams had very kind words to say about the comedian. "He was an amazingly kind and generous person," said Richter. "It's got to be a terrible time for his family, and our thoughts go out to them."