The Tonight Show Starring Jimmy Fallon Season 6 Keira Knightley, Jon Glaser, The Chainsmokers ft. 5 Seconds of Summer Season 6, episode 99 Keira Knightley, Jon Glaser, The Chainsmokers ft. 5 Seconds of Summer March 12, 2019 45 min Previous episode Ricky Gervais, Karlie Kloss, Maren Morris Next episode Mark Ruffalo, Jim Jefferies, Normani ft. 6LACK