It's a sad day in the world of comedy.

Sid Caesar, a legendary comic who has been responsible for bringing the laughs for decades, has died at 91 years old. Caesar's friend Larry King announced the news on Twitter, however, no further details were immediately available.

"Sorry to learn about the passing of Sid Caesar-a dear friend, a comic genius & an American classic- there will never be another one like him," King wrote.

The New York-born star began performing at nightclubs before becoming an television icon and pioneer, ultimately changing the course of TV forever. The sketch-comedy master launched a 90-minute Saturday night variety program, Your Show of Shows, which premiered in 1950, with a writing staff that included Woody Allen, Neil Simon, Mel Brooks and Larry Gelbart.

The live broadcast was such a hit that the show lasted for four years before being turned into Caesar's Hour from 1954 to 1957.