‘Tonight': Milo Ventimiglia Leads the Cast of ‘This Is Us' in a Big Three Chant

Jimmy Fallon chats with “This Is Us” stars Milo Ventimiglia, Mandy Moore, Sterling K. Brown, Chrissy Metz and Justin Hartley about the Beyoncé-level lengths they went through to keep the big post-Super Bowl episode about Jack’s death a secret.