Dylan O'Brien Trained in Parks to Get Jacked for Send Help, Talks Working with Rachel McAdams

Dylan O'Brien talks about manifesting his Saturday Night role by dressing as The Blues Brothers in third grade, working with Rachel McAdams in the film Send Help and working out in parks to get prepared for the role. 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.com/the-tonight-show JIMMY FALLON ON SOCIAL Follow Jimmy:   / jimmyfallon   Like Jimmy:   / jimmyfallon   Follow Jimmy:   / jimmyfallon   Follow Jimmy on Threads: https://www.threads.net/@jimmyfallon Follow Jimmy on TikTok:   / jimmyfallon   THE TONIGHT SHOW ON SOCIAL Follow The Tonight Show:   / fallontonight   Like The Tonight Show:   / fallontonight   Follow The Tonight Show:   / fallontonight   Follow The Tonight Show on Threads: https://www.threads.net/@fallontonight The Tonight Show TikTok:   / fallontonight   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 NBC NBC YouTube: http://bit.ly/1dM1qBH Like NBC:   / nbc   Follow NBC:   / nbc   NBC Instagram:   / nbctv   Dylan O'Brien Trained in Parks to Get Jacked for Send Help, Talks Working with Rachel McAdams    / fallontonight   #FallonTonight #DylanOBrien #JimmyFallon