Oppenheimer: Cillian Murphy, Matt Damon and Emily Blunt at London movie premiere

PA Media Rami Malek, Matt Damon, Emily Blunt, Florence Pugh, Cillian Murphy, Christopher Nolan, and Robert Downey Jr, attend the UK premiere of Oppenheimer, at the Odeon Luxe, Leicester Square in London.PA Media
Rami Malek, Matt Damon, Emily Blunt, Florence Pugh, Cillian Murphy, Christopher Nolan, and Robert Downey Jr pose for photos

Stars including Cillian Murphy, Matt Damon and Emily Blunt have walked the red carpet in London for the eagerly-awaited UK premiere of Oppenheimer.

Christopher Nolan's much-hyped movie tells the story of American scientist J. Robert Oppenheimer, known for developing the atomic bomb.

Rami Malek, Florence Pugh and Robert Downey Jr are also among its big names.

But several stars left the premiere early, because of strike action called on Thursday evening.

Director Nolan told the audience before the screening of the film that "unfortunately they've left to write their picket signs".

Hollywood actors began their strike after talks between their union and major studios and streaming giants broke down. Writers in Hollywood are already taking industrial action - and a "double strike" such as this has not been seen since the 1960s and could bring the industry to a halt, as well as disrupting Oppenheimer's New York premiere on Monday.

Crowds gathered to watch the movie's makers and stars walk the red carpet, joined by celebrities including actor Jefferson Hall, acting husband-and-wife Josh Hartnett and Tamsin Egerton, and singer Sam Ryder.

PA Media Matt Damon, Emily Blunt, Cillian Murphy and Florence Pugh arrive for the UK premiere of Oppenheimer, at the Odeon Luxe, Leicester Square in LondonPA Media
Matt Damon, Emily Blunt, Cillian Murphy and Florence Pugh arrive for the premiere in Leicester Square
EPA Emma Thomas (2-L) and British director Christopher Nolan (L) with their family attend the UK premiere of Oppenheimer in central London, Britain, 13 May 2023. The film will be released in British cinemas on the 21 July 2023.EPA
British-American director Christopher Nolan attended the premiere with his wife, Emma Thomas, and four children

Speaking on the red carpet, Murphy told BBC News there was a "great atmosphere" in London, and "the response to the movie has been extraordinary".

Many of the stars told the BBC they were drawn to the film because of director Nolan. "There's a reason we all say that, it's just he's making the best movies right now," said Damon. "It's a thrill to get a call from him."

The premiere at the Odeon in Leicester Square comes ahead of the movie's release in the UK next Friday.

It comes the day after Wednesday night's premiere of Barbie, which is also out on 21 July. Because of the contrast between the two films and the same release date, many fans are planning to watch both, in what has been dubbed Barbenheimer.

PA Media Francis Bourgeois attends the UK premiere of Oppenheimer, at the Odeon Luxe, Leicester Square in London.PA Media
TikTok trainspotter Francis Bourgeois grins for the cameras at the premiere
PA Media Sam Ryder attends the UK premiere of Oppenheimer, at the Odeon Luxe, Leicester Square in LondoPA Media
A gust of wind momentarily messes up Sam Ryder's long locks
EPA Robert Downey Jr attends the UK premiere of Oppenheimer in central London, Britain, 13 May 2023. The film will be released in British cinemas on the 21 July 2023.EPA
Robert Downey Jr plays American businessman Lewis Strauss in the film
PA Media Brian Cox - an actual scientist - was also spotted on the red carpetPA Media
Brian Cox - an actual scientist - was also spotted on the red carpet