Jimmy and Robert De Niro paint each other's portraits in the viral TikTok portrait challenge.The Tonight Show Starring Jimmy Fallon. Stream now on Peacock: https://bit.ly/3gZJaNySubscribe 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.com/the-tonight-show JIMMY FALLON ON SOCIALFollow Jimmy: http://Twitter.com/JimmyFallonLike Jimmy: https://Facebook.com/JimmyFallonFollow Jimmy: https://www.instagram.com/jimmyfallon/Follow Jimmy on TikTok: https://www.tiktok.com/@jimmyfallonTHE TONIGHT SHOW ON SOCIALFollow The Tonight Show: http://Twitter.com/FallonTonightLike The Tonight Show: https://Facebook.com/FallonTonightFollow The Tonight Show: https://www.instagram.com/fallontonight/The Tonight Show TikTok: https://www.tiktok.com/@fallontonightTonight Show Tumblr: http://fallontonight.tumblr.com The Tonight Show Starring Jimmy Fallon features hilarious highlights from the show, including comedy sketches, music parodies, celebrity interviews, ridiculous games, and, of course, Jimmy's Thank You Notes and hashtags! You'll also find behind the scenes videos and other great web exclusives. GET MORE NBCNBC YouTube: http://bit.ly/1dM1qBHLike NBC: http://Facebook.com/NBCFollow NBC: http://Twitter.com/NBCNBC Instagram: http://instagram.com/nbctvNBC Tumblr: http://nbctv.tumblr.com/ Robert De Niro and Jimmy Do the TikTok Portrait Challenge (Cold Open) | The Tonight Showhttp://www.youtube.com/fallontonight#FallonTonight #RobertDeNiro#JimmyFallon