Billy Magnussen. Actor: Game Night. William Gregory Magnussen is an American actor. He has been featured in the films Into the Woods (2014), Birth of the Dragon (2016), Game Night (2018), and Aladdin (2019), and has had supporting television roles in Get Shorty (2017) and Maniac (2018). In 2021, Magnussen starred in the sci-fi series Made for Love on HBO Max and appeared in the films The Many Saints of...