A Twitter account under the name Rupert Murdoch does belong to the media mogul and not an impostor, it has been confirmed.
Someone using the media mogul's name started tweeting over the New Year holiday and a spokeswoman at his News International company has confirmed the account is genuine.
The embattled chief of the sprawling News Corporation media conglomerate says on Twitter that his resolutions for 2012 are to "try to maintain humility" and go on a diet.
The 80-year-old added that he wants to stay curious. He also sounds bored with his holiday, saying: "Back to work tomorrow. Enough idling!"
Murdoch may face questioning in the UK later this year from the Leveson Inquiry, which is investigating media ethics in the wake of the phone hacking scandal that saw the News of the World shut down.
"My resolutions, try to maintain humility and always curiosity," he tweets. "And of course diet!"
Murdoch has attracted more than 47,000 followers, just two days after he started tweeting. His wife Wendi Deng has also started tweeting - she calls herself wendi-deng.
Murdoch has also complained there are "too many people" on the island of St. Bart's, an exclusive Caribbean hideaway.
He also praises Mike Bloomberg, the Republican mayor of New York City, and Rick Santorum, a Republican presidential candidate.
"Happy 2012," he says. "May it be better than all experts predict. Has to be! Must change everything to create jobs for all, especially young."