Michael Stewart Stuhlbarg ( STOOL-barg; born July 5, 1968) is an American actor. He is known as a character actor having portrayed a variety of roles in film, television and theatre. He has received two Screen Actors Guild Awards and a Drama Desk Award. He has also received numerous award nominations including for a Primetime Emmy Award, a Tony Award, and a Golden Globe Award.

He rose to prominence as troubled university professor Larry Gopnik in the 2009 dark comedy film A Serious Man, directed by Joel and Ethan Coen. Stuhlbarg has since become known as a character actor and has appeared in numerous films and television series portraying real life figures, such as George Yeaman in Lincoln (2012), Lew Wasserman in Hitchcock (2012), Andy Hertzfeld in Steve Jobs (2015), Edward G. Robinson in Trumbo (2015), Abe Rosenthal in The Post (2017), Stanley Edgar Hyman in Shirley (2020), Arnold Rothstein in HBO's Boardwalk Empire (2010–2013), Richard A. Clarke in The Looming Tower (2018), and as Richard Sackler in Dopesick (2021).

Stuhlbarg's other notable supporting roles include Hugo (2011), Men in Black 3 (2012), Blue Jasmine (2013), Pawn Sacrifice (2014), Arrival (2016), Doctor Strange (2016), and Doctor Strange in the Multiverse of Madness (2022). He is also notable for his performance in television including his role in The Looming Tower which earned him a Primetime Emmy Award nomination for Outstanding Supporting Actor in a Limited Series or Movie. His other appearances in television include FX's Fargo (2017), Showtime's Your Honor (2020-present), and HBO's The Staircase (2022). On stage, Stuhlbarg has acted in numerous productions including the 2005 debut of Martin McDonagh's The Pillowman on Broadway, for which he won a Drama Desk Award and received a Tony Award nomination.