The New York magazine entertainment website Vulture reports that Kristen Stewart has been tapped to star in “Lie Down in Darkness,” an adaptation of the first book by “Sophie’s Choice” author William Styron. Styron grew up in Virginia, but he wound up spending his summers on Martha’s Vineyard, where his widow, the poet Rose Styron, still lives. She gave a talk in Edgartown last month for the organization Women Empowered. Vulture says that Stewart will play the lead in the family drama, which will be directed by Scott Cooper, who made the Jeff Bridges movie “Crazy Heart.” Stewart, of course, has been all over the tabloids ever since she confessed last week to cheating on Robert Pattinson with her “Snow White and the Huntsman” director Rupert Sanders. . . . In other Massachusetts book-to-movie news, a trailer has been released for the Brad Pitt movie “Killing Them Softly,” which is based on the book by the late Massachusetts writer George V. Higgins.