Lee Strasberg was an American theatre director, actor and acting teacher. He co-founded, with theatre directors Harold Clurman and Cheryl Crawford, the Group Theatre in 1931, which was hailed as "America's first true theatrical collective". In 1951, he became director of the nonprofit Actors Studio in New York City, considered "the nation's most prestigious acting school," and, in 1966, was involved in the creation of Actors Studio West in Los Angeles.

Harold Edgar Clurman was an American theatre director and drama critic. In 2003, he was named one of the most influential figures in U.S. theater by PBS. He was one of the three founders of New York City's Group Theatre (1931–1941). He directed more than 40 plays in his career and, during the 1950s, was nominated for a Tony Award as director for several productions. In addition to his directing career, he was drama critic for The New Republic (1948–1952) and The Nation (1953–1980), helping shape American theater by writing about it. Clurman wrote seven books about the theatre, including his memoir The Fervent Years: The Group Theatre and the Thirties (1961).