Morris Carnovsky was an American stage and film actor. He was one of the founders of the Group Theatre (1931-1940) in New York City and had a thriving acting career both on Broadway and in films until, in the early 1950s, professional colleagues told the House Un-American Activities Committee that Carnovsky had been a Communist Party member. He was blacklisted and worked less frequently for a few years, but then re-established his acting career, taking on many Shakespearean roles at the Stratford Shakespeare Festival and performing the title roles in college campus productions of King Lear and The Merchant of Venice. Carnovsky's nephew is veteran character actor and longtime "Pathmark Guy" James Karen.

The Group Theatre was a theater collective based in New York City and 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."