Mark Nelson (born September 26, 1955) is an American actor, director and teacher. He appeared on Broadway in Angels in America, The Invention of Love,[1] After the Fall and Three Sisters at Roundabout Theatre Company, and the original casts of A Few Good Men, Rumors, Biloxi Blues and Amadeus. For his performance as Einstein in Steve Martin's Picasso at the Lapin Agile[2] he received the Obie, Drama League, Carbonell and San Francisco Critics Awards. He played Herr Schultz in the 2016 national tour of Cabaret and acted off-Broadway in My Name is Asher Lev[3] for which he received a Lortel nomination. Other roles include Shylock in The Merchant of Venice at The Shakespeare Theater,[4] Uncle Vanya (in Bartlett Sher's production at the Intiman Theatre), Matt in Talley's Folly (Berkshire Theatre Festival), Bluntschli in Arms and the Man (Long Wharf Theatre) and two solo pieces: I Am My Own Wife[5] by Doug Wright (Carbonell Award) and Underneath the Lintel[6] by Glen Berger (Connecticut Critics Award). His TV work includes roles on Unforgettable, Law & Order and Spin City. He teaches acting at Princeton University[7] and at New York City's HB Studio.[8] He has directed at Manhattan Theatre Club, Drama Dept.,[9] McCarter Theatre, George Street Playhouse,[10] and Chautauqua Theatre Company, and is a frequent guest director at the Juilliard School. He graduated from Princeton and then studied acting with Uta Hagen. In 2013 he received a Lunt-Fontanne Fellowship.[11]