For a young writer/director to hire stars such as Nicole Kidman, Harold Pinter and Ray Winstone to perform his work could suggest over-confidence, but Jez Butterworth is touchingly grateful that such luminaries want to collaborate with him. In his latest project, the film Birthday Girl, the Hollywood idol Kidman is joined by the French film director and actor Matthieu Kassovitz (Amélie), as well as the rising British actor Ben Chaplin (Game On; The Truth About Cats and Dogs).