A lineup of leading performers, including @fullfrontalsamb, #SteveCarell, #DaveChappelle, @garyclarkjr, @colbertlateshow, #PeteDavidson, @edhelms, @jimmykimmel, #JonMeacham, @oliviamunn, #JohnOliver, @springsteen, @bassem, and others salute Jon Stewart at the 23rd annual Kennedy Center Mark Twain Prize for American Humor. Premiering June 21 9/8c on @PBS: pbs.org/twainprize #TwainPrizePBS