PUBLISHED: 07:21 EST, 25 July 2016 | UPDATED: 08:38 EST, 25 July 2016
He was seen sporting an injury as he bandaged up his arm for a night out in London, on Saturday.
But Harry Styles proved he hadn’t lost his fighting spirit as he swigged from multiple bottles of beer, while filming for his debut acting role in WWII epic, Dunkirk, on Monday.
The 22-year-old looked completely authentic in his military ensemble and was covered in mud from head to toe - giving the impression that he had been weathered by war.
Harry’s slouchy trousers and oversized green jacket were a far cry from the trademark skinny jeans and silk shirts that he wore during his One Direction days.
He also styled his freshly cropped brunette locks into a rugged and care-free design that fell casually over his forehead.
The former singer appeared to take his role incredibly seriously, while filming in the overcast coastal town of Swanage, in Dorset.
And Harry kept in character at all times with a stony expression, which he broke only to smolder at the camera.
However, as he boarded the train with an apple and a few bottles of beer in hand, Harry could barely keep the smile off his face as he waved the other crew-members goodbye.
He even leaned precariously out of the window to tenderly touch the arms of his fellow actors - who were also dressed in vintage war-time outfits.
Dunkirk tells the story of one of the most successful rescue missions in British history. Code-named Operation Dynamo, the evacuation of soldiers from Dunkirk beach took place between 26 May and 4 June 1940 under the supervision and mastermind of Vice-Admiral Bertram Ramsay.
Looking battle-weary in his military uniform, Harry’s latest filming pictures appeared to show that he and his castmates were playing soldiers among the 338,000 soldiers to survive the battle on the beaches.
While it is unclear whether Harry’s alter-ego sustains any nasty war wounds during the movie, he had previously been sporting a red-stained bandage on his left hand during filming.
But his boyband following will be relieved at the thought that he could be ‘one of the lucky ones’, considering the reality of one of history’s most memorable moments in battle.
Harry is just one of the famous faces to join the stellar cast, since the list of big names also includes Tom Hardy, Cillian Murphy, Kenneth Branagh and Mark Rylance.
Speaking about his One Direction co-star, Mark told the Evening Standard: 'What’s really surprised me is he’s really witty, really funny - he really makes me laugh. He’s been ever so brave, not making any fuss.
'He seems remarkable … one of those people - Sean Penn has it too - a kind of panache.
'I look at them and think, “How did you get that? How do you get so that life is easy?” But he has got a lovely, lovely character. It’s a gift.’
Last month, 1,500 extras were gathered on Dunkirk beach to recreate the battle scenes, which also perfectly mirrored the ones described in Winston Churchill’s landmark speech delivered the House of Commons of the Parliament on 4 June 1940, after the Allied troops were evacuated from the beaches of northern France.
In the same spot, 76 years ago, 338,000 British, French and Belgian troops were evacuated in Operation Dynamo.
As part of the filming, actors and extras were filmed under attack on the shoreline, some of them in the water and some of them on the sand, which could explain why Harry and his comrades were covered in dirt.