 Connelly had contributed to several Broadway musicals before teaming up with his most important collaborator, George S. Kaufman, in 1921.During their four-year partnership, they wrote five comedies – "Dulcy" (1921), "To the Ladies" (1922), "Merton of the Movies" (1922), "The Deep Tangled Wildwood" (1923) and "Beggar on Horseback" (1924) – and also co-directed and contributed sketches to the 1922 revue "The '49ers", collaborated on the book to the musical comedy "Helen of Troy, New York" (1923), and wrote both the book and lyrics for another musical comedy, "Be Yourself" (1924).Connelly received the Pulitzer Prize for Drama for "The Green Pastures" in 1930.