The Sun on Sunday has been banned from revealing that a "well-known person" in the entertainment industry had a sexual threesome with another individual and their partner.
The Court of Appeal overturned Mr Justice Cranston's initial refusal to grant an interim injunction to block publication by the Sun on Sunday of a story about the celebrity's affair.
Lord Justice Jackson, who was sitting with Lady Justice King, cited in the decision the comment by the European Court of Human Rights in Couderc and Hachette Filipacchi Associes v France that kiss-and-tell stories about a public figure which did no more than satisfy readers' curiosity concerning his private life did not serve the public interest.
The case started in January, when the Sun on Sunday was contacted by a couple, AB and CD, with whom, the married celebrity – referred to only as PJS – had the sexual threesome.
Lord Justice Jackson said PJS, who is in an "open marriage" with YMA, another well-known person in the entertainment world, met AB, whose partner was CD, in 2007 or 2008, and the pair had "occasional sexual encounters" starting in 2009.