NANTUCKET — Mark Ruffalo was at the Nantucket Film Festival last weekend to promote his new film, “Begin Again,” a romantic dramedy about the music industry written and directed by John Carney, best known for “Once.” Ruffalo stars as Dan, an alcoholic music industry exec who’s lost his way in the business — and his personal life. Like “Once,” the film is as much about the soundtrack as it is the story.
On Nantucket, Ruffalo did more than just screen his film. He arrived on the island early to do work for his organization Water Defense, a nonprofit that focuses on clean-water initiatives. He met with scientists at the University of Massachusetts Boston’s Nantucket Field Station and even slept on campus Friday night. Just a few days after his work on Nantucket, he was back in London filming the next installment of “The Avengers,” in which he plays Bruce Banner, a.k.a. the Hulk.