Jimmy Fallon September 21, 2019 12:31 am 'Tonight': Chrissy Metz and Jimmy Fallon Improvise a ‘This Is Us' Theme Song “This Is Us” Actress Chrissy Metz give hints about director M. Night Shyamalan’s cameo in season 4 and improvises a theme song for the show with host Jimmy Fallon. US & World Videos 8:39 Gina Rodriguez gushes 0ver motherhood with son Charlie 2:22 Scarlett Johansson and Colin Jost have date night at White House Correspondents' dinner 1:37 Pro-Palestinian protesters gather outside White House correspondents' dinner 2:05 How ‘Love Is Blind' made Vanessa Lachey and Nick Lachey's marriage stronger 2:30 ‘Baby Reindeer': Inside Richard Gadd's Netflix phenomenon