Benjamin "Ben" Rosenfield is an American actor and Musician, best known for playing Willie Thompson on the fourth and fifth seasons of HBO's period crime drama series Boardwalk Empire (2013–2014). His first role was in the Off-Broadway stage adaptation of the Ingmar Bergman film Through a Glass Darkly. He has starred as Tim Buckley in the bio-pic Greetings from Tim Buckley. Rosenfield played Henry Ellis in the musical drama Song One (2014), starred as Fisher Miller in the teen drama Affluenza (2014), (2015), and Bertram Flusser in the period drama Indignation. In 2016 Ben starred as Dan Mercer the romantic drama 6 Years. In 2017, he portrayed Sam Colby in the third season of Twin Peaks. In 2017 Rosenfield also starred in the dramatic comedy Person to Person. He played Aron Church in 2019 film Mickey and the Bear. In 2019 Rosenfield also appeared in the Netflix documentary series The Family. In 2020 he was cast opposite Cate Blanchett in the limited series Mrs. America.