The Group Theater was a New York City theater collective formed in 1931 by Harold Clurman, Cheryl Crawford and Lee Strasberg. It was intended as a base for the kind of theatre they and their colleagues believed in—a forceful, naturalistic and highly disciplined artistry. They were pioneers of what would become an "American acting technique", derived from the teachings of Konstantin Stanislavski, but pushed beyond them as well. The company included actors, directors, playwrights, and producers. The name "Group" came from the idea of the actors as a pure ensemble;a reference to the company as "our group" led them to "accept the inevitable and call their company The Group Theatre."
The New York-based Group Theater had no connection with the identically-named London-based Group Theatre founded in 1932.
In the ten years of its existence, the Group Theater produced works by many important American playwrights, most notably Clifford Odets and Irwin Shaw. Its most successful production was the 1937-38 Broadway hit Golden Boy, starring Luther Adler and Frances Farmer.
The Group included Elia Kazan, Harold Clurman, Harry Morgan (billed as Harry Bratsburg), Stella Adler (a founding member), Robert Lewis, John Garfield (billed as Jules Garfield), Canada Lee, Franchot Tone, Frances Farmer, Phoebe Brand, Ruth Nelson, Will Geer, Howard Da Silva, John Randolph, Joseph Bromberg, Michael Gordon, Oscar Saul, Paul Green, Clifford Odets, Paul Strand, Morris Carnovsky, Sanford Meisner, Marc Blitzstein, Anna Sokolow, Lee J. Cobb, Roman Bohnen, Jay Adler, Luther Adler, Robert Ardrey, Don Richardson and many others.