The Coen brothers have released the trailer for their latest film, Inside Llewyn Davis. The movie is loosely based on Dave Van Ronk, a central figure in the Greenwich Village folk scene of the 60s which gave rise to luminaries such as Bob Dylan. Its first trailer shows Davis, played by Oscar Isaac, struggling to find recognition for his music and enduring a withering lesson on sex from his former love interest, played by Carey Mulligan.