Rupert Murdoch has notched up more than 45,000 followers after joining Twitter . Murdoch 's tweets so far focus on family , politics and cinema releases . Comment: News Corp. official confirms to CNN that account is genuine .
Rupert Murdoch has notched up more than 45,000 followers after joining Twitter . Murdoch 's tweets so far focus on family , politics and cinema releases . 80-year-old 's social media appearance called a PR stunt by some . News Corp. official confirms to CNN that account is genuine .