A Flag is Born is a 1946 play that advocated the creation of a homeland for the Jewish people in the ancient Land of Israel—at the time of the play's release Mandatory Palestine, under British administration. With a cast including Paul Muni, Celia Adler and Marlon Brando, it opened on Broadway on September 4, 1946. It was written by Ben Hecht and directed by Luther Adler, with music by Kurt Weill. A Flag is Born was produced by the American League for a Free Palestine, an organization headed by Hillel Kook (known in America by the anglicized name Peter Bergson), to raise money for Zionist causes.