Valerie Harper, the actress best known for her role as Rhoda Morgenstern on The Mary Tyler Moore Show and the ensuing Rhoda, has been diagnosed with terminal brain cancer, reports People in a cover story. Doctors say the 73-year-old Harper, who fought lung cancer just four years ago, is suffering from leptomeningeal carcinomatosis and likely has as few as three months to live. "I don't think of dying," says Harper. "I think of being here now." (More Valerie Harper stories.)