Nicole Kidman and Clive Owen play writers Martha Gellhorn and Ernest Hemingway in a new HBO film, but they'd prefer to keep their own lives off-screen. At a news conference Friday promoting “Hemingway & Gellhorn,” Kidman said she likes her privacy and protects it “quite diligently.” She and husband Keith Urban live in Nashville, Tennessee, with their two daughters. Kidman's British co-star shares her viewpoint. Of a Clive Owen biopic, he said, “I wouldn't want to see it.” “Hemingway & Gellhorn” is set to air in May. It's about the passionate, short-lived relationship of Gellhorn, a daring war correspondent, and the great novelist. Kidman says she enjoys portraying inspirational women “who defy the odds and that burn bright,” as Gellhorn did.