Secret Cinema is to stage a one-off secret screening this weekend to protest against 'the attack on freedom of expression', in the wake of threats made by anonymous hackers to target cinemas that show Sony’s The Interview.

It is unconfirmed which film will be shown but simultaneous screenings will be held at secret locations in London, San Francisco and Rome, with all proceeds going to global free speech charity Article 19.

Audience members have been asked to wear dark suits and bring a small gift to give to a stranger.

The move comes after Sony Pictures was targeted in a cyber-attack believed by US intelligence services to have been carried out by North Korea.

The entertainment company not only saw embarrassing private emails leaked but also made the decision to cancel the Christmas Day release of its comedy The Interview, which is based around the assassination of dictator Kim Jong-Un.

Major cinema chains had already refused to screen the film following the threat by hackers to carry out a 9/11 style attack on theatres.

It is expected that US officials will make a formal statement on the cyber-attack later today.

Sony Cyber Attack: The Worst Affected In Hollywood Show all 13 1 /13 Sony Cyber Attack: The Worst Affected In Hollywood Sony Cyber Attack: The Worst Affected In Hollywood Leonardo DiCaprio The actor's 'horrible behaviour' over Steve Jobs biopic was branded 'actually despicable' in leaked Sony executive emails Getty Images Sony Cyber Attack: The Worst Affected In Hollywood Seth Rogen Seth Rogen and James Franco cancel Interview (North Korea-baiting film) press appearances after Sony hackers' threats Sony Cyber Attack: The Worst Affected In Hollywood James Franco Seth Rogen and James Franco cancel Interview press appearances after Sony hackers' threats AP Sony Cyber Attack: The Worst Affected In Hollywood Aaron Sorkin The screenwriter has said that the people who hacked into Sony Entertainment Pictures and released private emails are 'threatening the lives of whole families' Theo Wargo | Getty Images for Nantucket Film Festival Sony Cyber Attack: The Worst Affected In Hollywood Amy Pascal Also leaked: Sony Pictures co-chair Amy Pascal's email joking about President Barack Obama's race Getty Images Sony Cyber Attack: The Worst Affected In Hollywood George Clooney Leaked email chain between Pascal and George Clooney appeared to reveal just how much the actor struggled to cope with the criticism of his The Monuments Men Getty Sony Cyber Attack: The Worst Affected In Hollywood Barack Obama Sony executives Scott Rudin and Amy Pascal's leaked email exchange jokes about Barack Obama favouring films with black actors Getty Sony Cyber Attack: The Worst Affected In Hollywood Channing Tatum Channing Tatum's leaked Sony executive email responding to the success of 22 Jump Street with Jonah Hill, which became the highest grossing R-rated comedy ever when it opened in June this year Getty Images Sony Cyber Attack: The Worst Affected In Hollywood Jaden and Willow Smith Will Smith and Jada Pinkett Smith's children Willow and Jaden Smith found themselves in the Sony inbox as well Getty Sony Cyber Attack: The Worst Affected In Hollywood Mark Gordon DiCaprio's exchange with Jobs TV producer Mark Gordon (pictured) was leaked too Getty Images Sony Cyber Attack: The Worst Affected In Hollywood Princess Beatrice Sony hackers linked to North Korea revealed Princess Beatrice earns $30,000 a year Sony Cyber Attack: The Worst Affected In Hollywood Michael Fassbender Aaron Sorkin's leaked emails claimed he had no idea who actor Michael Fassbender (pictured) was Getty Images Sony Cyber Attack: The Worst Affected In Hollywood Scott Rudin Information leaked has also included embarrassing emails involving high profile producer Scott Rudin attacking Angelina Jolie Getty Images

Secret Cinema said in a release: "Secret Cinema passionately believes in the freedom to create and is looking for partners to join them in hosting a simultaneous screening across the Globe with a view to strengthen the resolve of filmmakers and artists against the threat of censorship, and to stand in solidarity with artists whose freedom of expression is routinely curtailed."

Sunday’s screening will take place at a secret location in East London and the show will begin at 7.30pm, with doors opening at 6.30pm.

Secret Cinema is also asking people to host their own screenings at the same time and to support the protest using the hashtag #freedomtocreate