As news of actor Robin Williams's death spread Monday night, Conan O'Brien was wrapping up his show, which would air a few hours later. When Conan learned what had happened, he took a couple of minutes before the taping finished, and broke the news to the audience.

"I'm sorry to anyone in our studio audience that I'm breaking this news," a visibly emotional O'Brien said. "This is absolutely shocking and horrifying."

Andy Richter and guest Will Arnett also reacted and remembered Williams.

"He was an amazingly kind and generous person, and it's got to be a terrible time for his family, and our thoughts go out to them," Richter said.

"As funny as he was, he was truly one of the all-time greats," Arnett said. "He was even better as a person."

For a less sad clip involving Conan and Robin Williams, watch him do his thing in a 2005 appearance on Late Night with Conan O'Brien.