The first 'Avengers' movie, released in 2012, was the first Marvel film to gross over $1 billion worldwide, solidifying the MCU as a dominant force in the film industry.
Robert Downey Jr., who played Iron Man, was the highest-paid actor in the MCU, earning $50 million for his role in 'The Avengers' alone.
Mark Ruffalo replaced Edward Norton as the Hulk in 'The Avengers,' and his portrayal became widely praised, leading to his continued role in the MCU.
The 'shawarma scene' at the end of 'The Avengers' was added after the film's premiere. The cast filmed it after the premiere in Los Angeles, making it one of the quickest and most iconic post-credits scenes in the MCU.
Chris Evans had to cover his face in the shawarma scene because he had grown a beard for another film role, so he wore a prosthetic jaw to maintain continuity.
In 'Avengers: Age of Ultron,' James Spader, who voiced Ultron, performed motion capture for the character, allowing his movements and facial expressions to be directly translated into the CGI character.
The Russo brothers, who directed 'Avengers: Infinity War' and 'Avengers: Endgame,' previously worked on TV shows like 'Community' and 'Arrested Development' before joining the MCU.
The battle scene in New York from 'The Avengers' was filmed in Cleveland, Ohio, with extensive use of CGI to recreate the iconic New York skyline.
Scarlett Johansson was pregnant during the filming of 'Avengers: Age of Ultron,' so many of her action scenes were completed by stunt doubles and CGI was used to hide her pregnancy.
The Hulk's famous line 'Puny god' after smashing Loki was improvised by Mark Ruffalo during filming, adding a humorous and memorable moment to the film.
Tom Hiddleston, who plays Loki, originally auditioned for the role of Thor, but the filmmakers felt he was better suited as the God of Mischief.
The 'Avengers: Endgame' movie became the highest-grossing film of all time, surpassing 'Avatar' with a worldwide gross of over $2.798 billion.
In 'Avengers: Infinity War,' the filmmakers had to keep the plot a secret from the cast, so actors like Tom Holland and Mark Ruffalo were given fake scripts or only their scenes to prevent spoilers.
The epic battle scenes in 'Avengers: Endgame' involved hundreds of extras and required months of filming and post-production work to bring to life the final showdown against Thanos.
The famous 'Avengers, assemble!' line was saved for 'Endgame' and delivered by Chris Evans as Captain America, marking one of the most anticipated and iconic moments in the MCU.