He later became a founding member of the famed Group Theatre, together with Harold Clurman, Cheryl Crawford, Lee Strasberg, Stella Adler, Clifford Odets, and others, many of whom had worked with the Theatre Guild.
==Kariera==Naslednje leto se je pridružil gledališkemu združenju Theatre Guild in odigral vlogo Curlyja v igri "Green Grow the Lilacs" (ki so jo kasneje predelali v slavni muzikal "Oklahoma!").