Pioneer of the MCU (Marvel Cinematic Universe), Robert Downey Jr. made history as Iron Man. Without the success of his 

franchise, the following 30-plus productions would not have happened. But why did the renowned Hollywood actor agree to play Tony Stark for 11 years?

In an interview with Vanity Fair magazine, Anthony and Joe Russo brought an unusual answer for Marvel fans. According to the

directors of Avengers: Infinity War (2018) and Ultimatum (2019), Robert Downey Jr. did not face the same challenges as his teammates during action scenes.

"You know, I think the reason he played Iron Man for a decade is because he never had to go on set," Joe Russo joked.

"As soon as Iron Man would put on the armor, Robert would leave," explained the director of Downey Jr.'s latest Marvel film.

Unlike Black Widow (Scarlett Johansson) and Thor (Chris Hemsworth), Iron Man did not need the

presence of his performer to be on the big screen. The hero's armor made it possible to bring in stuntmen during action scenes.

So, unlike his fellow actors on the set, the actor did not have to put all his efforts during scenes in the hero's full armor.

As a result, Downey Jr. was able to live the billionaire Tony Stark for more than a decade - the fee, of course, also helped.

In the MCU, the 57-year-old star collects an enviable resume. He has played the technological hero in the

Iron Man trilogy, Avengers (2012), Avengers: Age of Ultron (2014), Captain America: Civil War (2016), Spider-Man: Homecoming (2017), Avengers: Infinity War, and Avengers: Ultimatum.