Fred Melamed is an American actor, comedian, and writer. He is best known for portraying Sy Ableman in A Serious Man (2009), Arthur Hart in WandaVision (2022), Tom Posorro in Barry (2022-23), and William Ginsberg in American Crime Story. He is also known for his collaborations with Woody Allen appearing in seven of his films including Hannah and Her Sisters (1986), Radio Days (1987), and Crimes and Misdemeanors (1989). Vulture named him one of the greatest character actors working today.His other film roles include Hail, Caesar! (2016), Shiva Baby (2020), and In a World... (2012). He is also known for his numerous guest roles in television including Curb Your Enthusiasm, The Good Wife, and 30 Rock. He has had major roles on Lady Dynamite, Casual, New Girl, Brooklyn Nine-Nine, The Morning Show, Fargo, House of Lies, and Adventure Time.