Hugh Grant, one of the most high-profile victims of phone-hacking by the News of the World, announced on Twitter Saturday that he has a son with Tinglan Hong. “In answer to some journos, am thrilled to announce my daughter now has a brother,” he tweeted. “Adore them both to an uncool degree. They have a fab mum.” His second tweet said, “And to be crystal clear. I am the Daddy.” Since the News of the World scandal, the 52-year-old star of “Notting Hill” has campaigned for a more responsible press.