A Most Wanted Man is a 2014 espionage thriller film based on the novel of the same name by John le Carré, the film stars Willem Dafoe, an American actor, a member of which experimental theatre company? 
A Most Wanted Man (film):  The film stars Philip Seymour Hoffman, Rachel McAdams, Willem Dafoe, Robin Wright, Grigoriy Dobrygin, Daniel Brühl and Nina Hoss. Willem Dafoe:  A member of the experimental theatre company the Wooster Group, he was nominated for the Academy Award for Best Supporting Actor for his roles as Elias in Oliver Stone's "Platoon" (1986) and Max Schreck in the comedy-horror film "Shadow of the Vampire" (2000).
Wooster Group