Media outlets have been barred from the proceedings, which are expected to unfold with testimony from the media titan and the four children named in the trust over the next week, according to the New York Times, which first brought the dispute to light after obtaining copies of sealed court documents.

These types of family battles often end in settlements. The case could also be prolonged, if it ends in a decision that one side chooses to appeal against.

Prudence is Mr Murdoch’s eldest child, from his marriage to his first wife Patricia Booker.