A conversation with the writer-director and co-stars of the new film “Julie & Julia,” based on two bestselling memoirs: Julie Powells “Julie & Julia” and Julia Childs “My Life in France.” Hear them talk about creating the movie, which opens August 7, 2009 and about their careers, artistic collaborations, film, food and culture and how with the right combination of passion, fearlessness and butter, anything is possible. Moderated by New York Times Magazine staff writer and The Timess Dining section Feed Me columnist, Alex Witchel.