News Corp chairman Rupert Murdoch is engaged to former San Francisco police chaplain Ann Lesley Smith, his spokesperson has confirmed, which will mark the fifth marriage for the 92-year-old media mogul.

Mr Murdoch finalised his divorce from actress and model Jerry Hall in August.

Mr Murdoch and Ms Smith, 66, met in September at his vineyard Moraga in Bel Air, California. He called her two weeks later, Mr Murdoch told the News Corp-owned New York Post, which broke the news of the couple’s engagement.

Ms Smith is a widow whose late husband was Chester Smith, a country singer, radio and TV executive.

On March 17 in New York, Mr Murdoch presented Ms Smith with an Asscher-cut diamond solitaire ring, according to the Post.

They will be married in the northern hemisphere summer.

“I was very nervous. I dreaded falling in love but I knew this would be my last. It better be. I’m happy,” Mr Murdoch told the Post.

Mr Murdoch’s nuptials are unlikely to change the ownership structure of businesses in which he holds stakes, including Fox Corp, the parent company of Fox News Channel, and News Corp.

Mr Murdoch controls News Corp and Fox Corp through a Nevada-based family trust that holds roughly a 40 per cent stake in voting shares of each company.

Fox is defending itself in a $US1.6 billion ($2.4 billion) defamation lawsuit from Dominion Voting Systems.

Dominion has accused the cable TV network of amplifying claims that Dominion voting machines were used to rig the 2020 presidential election against Republican Donald Trump and in favour of his rival Joe Biden, who won the election.

Fox has defended its coverage, arguing claims by Mr Trump and his lawyers were inherently newsworthy and protected by the first amendment of the US constitution.

-AAP