Ronald Bronstein is an American film director, screenwriter, editor and actor. He directed, wrote and edited the 2007 film Frownland. He is also known as a prominent collaborator of the Safdie brothers, having acted as editor on all their features and co-written all their screenplays since 2009's Daddy Longlegs.

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罗纳德·布朗斯坦（Ronald Bronstein）是美国电影导演、编剧、剪辑师和演员。他执导、编剧和剪辑了 2007 年的电影《Frownland》。他也被称为萨夫迪兄弟的杰出合作者，自 2014 年的《天知道什么》以来，他担任了他们所有故事片的编辑，并共同编写了他们所有的剧本。