The company acknowledged that the information obtained through hacking should never have been published.
Miller settled the case for 100,000 pounds ($164,500) in damages and costs.
A lawyer for Miller said that she was the subject of numerous articles containing "intrusive and private information."
A number of celebrities and public figures have said they were victims of phone hacking by the tabloid.
News Group is owned by News International Ltd., a subsidiary of Rupert Murdoch's News Corp.