Gemma Chan was seen suspended 40ft above the ground in north London while filming the latest Marvel film The Eternals.
The movie, which is due out in November this year, will be the 25th film in the Marvel Cinematic Universe (MCU) franchise.
On Friday morning, a small crane was placed at the top of Parliament Hill in Hampstead Heath and Chan was attached to a harness and hoisted 15 feet into the air while wind machines blew leaves around her.
She was then raised higher up later on.
It is thought the scene takes place at the end of the film where her character - the superhero Sersi - is lifted to the heavens.
The London-born actress, 37, who also appeared as another character in Marvel's Captain America, did several test shots before the cameras rolled.
Dog walkers and curious residents were kept away from the filming location amid tight security with guards posted on pathways and in bushes barring people from taking photographs.
One woman said: "I was wondering what was going on but it was top secret. When I tried to take a photo on my phone but some young man started shouting at me, which was a bit rude."
The plot for the film centres on an immortal alien race who are protecting humanity from their evil counterparts, The Deviants.
Angelina Jolie plays the lead role, starring as Thena, while the cast also boasts A-listers including Richard Madden and Kumail Nanjiani, along with Dunkirk actor Barry Keoghan.
Yesterday, fellow star Kit Harington - who plays Black Knight (Dane Whitman) in the film - was seen walking with Chan around the heath.
Harrington, 33, is the latest Thrones actor to take part in a superhero film, along the likes of Sophie Turner and Peter Dinklage, who have starred in X Men movies.
For the shoot he wore a brown jacket with blue jeans and a red scarf for his scene with Chan who wore a long green coat and a woollen hat as they were filmed deep in conversation.
They were later filmed on the top of the hill, that is famous for its sweeping views of London.
