William Gregory Magnussen (born April 20, 1985) is an American actor and comedian of stage, television, and film. He is best known for roles in Into the Woods (2014), Birth of the Dragon (2016), Game Night (2018), and Aladdin (2019). He has starred in Broadway and off-Broadway theater productions, including 2013's Vanya and Sonia and Masha and Spike, for which he received a nomination for the Tony Award for Best Featured Actor in a Play.