Will Ferrell, Nikki Glaser, David Letterman, Tracy Morgan, John Mulaney, Adam Sandler and Sarah Silverman were among those who paid tribute to O'Brien at the March 23 Kennedy Center event.

Among those paying tribute to the comedian at Sunday night's event in Washington, D.C., were Adam Sandler, John Mulaney, Sarah Silverman and a dozen Mark Twain impersonators.

Speaking of woke, O’Brien noted in his acceptance speech that Mark Twain held characteristics many would classify with that word nowadays. “Twain was allergic to hypocrisy and he loathed racism,” he said.