Angelina Jolie and Richard Madden were reportedly forced to stop filming The Eternals after an unexploded bomb was found near its Spanish set.
The base, on the Canary Island of Fuerteventura, allegedly had to be evacuated to allow bomb disposal experts to disarm the device, thought to have been left over from a Nazi World War II base.
An insider told The Sun: 'It was obviously terrifying — the bomb could have been there for decades untouched but who knows what might have happened if it was disturbed.
It was continued: 'Some of the biggest stars in the world were on set and nobody was taking any chances. Fortunately, experts dealt with it.'
According to the publication, onlookers described panic sweeping through the set before cast and crew were ordered to leave.
Angelina, 44, and Richard, 33, are playing leaders Thena and Ikaris in The Eternals, a Marvel superheroes movie.
Game Of Thrones hunk Kit Harrington, 32, has also been cast in the flick, which is set to be released next year.
Production is underway in the Dunes of Corralejo, with tents and trailers set up in the stunning Natural Park desert, which boasts 48,000 hectres of land.
The actress joined Salma Hayek, Richard Madden, Kumail Nanjiani, Scarlett Johansson and Don Lee in the big budget movie.
At the panel dedicated to Marvel during San Diego Comic Con, Angelina said: 'I’m so excited to be here! I think what it means to be a part of the MCU, what it means to be an Eternal, what it means to be in this family.
'We’ve all read the script and we know what the task is and so we are going to work very, very hard,' she added, according to JustJared.
Fellow cast-member Scarlett is set to reprise her role as Natasha Romanoff, aka Black Widow, for a spin-off prequel film after her character met her untimely end in Avengers: Endgame.
She previously gushed that it's 'very exciting' to have Angelina in the Marvel Cinematic Universe (MCU).
© Associated Newspapers Ltd.