Milly Alcock talks about getting a case of the giggles while onstage during the Golden Globes, not being allowed to spill any details on Supergirl: Woman of Tomorrow and working on Netflix's Sirens. The Tonight Show Starring Jimmy Fallon. Stream now on Peacock: https://bit.ly/3gZJaNy Subscribe NOW to The Tonight Show Starring Jimmy Fallon: http://bit.ly/1nwT1aN Watch The Tonight Show Starring Jimmy Fallon Weeknights 11:35ET/10:35c Get more The Tonight Show Starring Jimmy Fallon: https://www.nbc.