In a unique twist, though, director Clint Eastwood chose to have the three heroes play themselves.
Sadler, Skarlatos and Stone met as children when they attended the same Christian school.
Interestingly, Bollywood superstar Akshay Kumar's PAD MAN is released today, Akshay is playing a character inspired from the life of real-life legend Arunachalam Muruganantham.
And speaking of interesting, did you know that Lois Weber was not only the most important female director of Hollywood's silent era, she rivaled D.W. Griffith as the era's most important filmmaker? It was too astronomical for it to be just chance.
"It looked like it was jammed or it wasn't working, and he was trying to charge the weapon", he told press gathered at the US embassy in Paris.
It's not their lack of compelling charisma that is the picture's main problem but rather that the on-screen story has not come up with anything compelling for them to do outside their heroism.
"We said yes right away", Skarlatos added.
Alek Skarlatos, Anthony Sadler and Spencer Stone told Deco how surreal it was working with the A-lister. Their conversations rarely amount to much more than small talk and commenting on whatever ancient ruin or landscape is in front of them, so it's tough to get inside their heads as adults.
Americans are understandably attracted to the notion of everyday heroes, of courageous warriors hidden in plain sight, people ordinary on the surface but possessed of astonishing reserves of courage that reveal themselves when emergency calls. They struggled to find a reason to leave Amsterdam - the city they most enjoyed during the trip.
Only when they board the train does the film hit its stride.
While on the train, the men were awakened by the sound of glass shattering. Their remembrance of the event is different than the tour guide's version (they thought American troops were bearing down on Hitler's location, when in fact it was the Russian army), to which the guide responds "You Americans don't have to be there every time evil is conquered".
A lawyer for the man suspected to be behind the attack, Ayoub El-Khazzani, said the movie presented a "fictionalised" and "one-sided" account of the incident, the BBC reports. Based on these conversations, Stone, Skarlatos and Sadler were uncertain about visiting the French capital.
The longtime friends remember that harrowing day on the train well.
Stone charged at him and the battle commenced as both men were face to face.
"It was the most fun two months of my life, our lives", Sadler said.
"It's kind of great feeling, like we're finally putting it behind us in a way", he said. "You rarely have a moment in your life where you can say, 'This was God.' I think since then it's affirmed our faith just because we've had a moment where you can't deny (Him)". "And then when he shot Mark with the handgun he must have dropped the magazine out of the gun and he used the only bullet to shoot him with".
"That's just one thing too, when people see the movie, it does a good job at laying out all the weird coincidences and plan by God that led us there". The moment of great goal that eventually touches their lives is 15 years in the future, and we follow them every inconsequential step of the way. "There's no denying it". All we needed was this simple act of bravery to know who they were. Against this, Dorothy Byskal's script and primary protagonist Spencer Stone insist that the events on that train were a long time coming. On the parallel track, a terrorist has taken over a train and the passengers are trying their best to hide.