David Letterman arrives at the Kennedy Center for the Performing Arts for the 20th Annual Mark Twain Prize for American Humor presented to him on Sunday.
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Conan O'Brien in 2016. He is being sued by a writer who accuses him of stealing jokes. O'Brien says the idea of stealing someone else's comedy makes him physically ill.
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Groundlings comedy troupe founder Gary Austin has died at 75. Here he attends a January 2016 Groundlings event with actress Victoria Carrol-Bell in West Hollywood, Calif.
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Comedian Irwin Corey was known for his long-running act as "The World's Foremost Authority." He is pictured here in the 1970s. Corey died at the age of 102.
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Corey Ryan Forrester, Drew Morgan and Trae Crowder write and perform together. They wrote a book called The Liberal Redneck Manifesto, which challenges what readers might expect from Southern comedy.
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Kevin Hart was the most successful comedian last year. He's seen here speaking at the official convention of the National Association of Theatre Owners in Las Vegas.
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