Robert Downey Jr.always conceive he was the perfect someone to play the persona of Tony Stark / Iron Man — the star of the first Marvel Cinematic Universe motion picture — but as we learned later on , he was in the minority . Due to his longtime struggle with drugs and alcohol and brushes with the law , Downey was considered arisky pickfor the role and the studio apartment was n’t willing to roll the dice on him . Ultimately , it wasIron Mandirector Jon Favreau who was capable to sway the studio to his agency of intellection — which is fortunate , because it ’s impossible to imagine the MCU without Downey today .
It turn out that had another histrion been cast , one of Iron Man ’s most iconic lines would have been entirely different , too , as it was ad-lib by Downey during yield .
MCU fans will never forget the terminal conniption of the firstIron Manmovie , as it perfectly caps off the film and define us up for Iron Man ’s future . “ I am Iron Man , ” Tony Stark states at a printing press conference , admitting his superhero identity to the world .

The line became so iconic that it appeared again at the end ofIron Man 3 . And Downey ’s improvisation actually turn out to have a wider impact on Marvel Studios as a whole .
" That winner inspired us to go further in confide ourselves to find the balance of staying true to the funnies and the spirit of the comics but not being afraid to adapt and develop and to change things , " Marvel Studios president Kevin FeigetoldDeadline in 2018 .
In the risible books , it take several age for Stark to support his alter ego to the public .
“ It ’s a fine assembly line , ” Feige continued . “ Tony Stark not reading off the card and not stick with the desex story ? Him just blurting out ‘ I am Iron Man ? ’ That seems very much in keeping with who that fiber is . It just had n’t been done in the comics before , but it was something very much in celebrate with the funnies ’ character and what he could have done . ”
More than 10 year after the release of the originalIron Man , Feige remains the architect of the MCU , and therefore one of its key decisiveness - makers .
“ I imagine it did inspire us on all the movies , " Feige continued . " What I love now—20 movies in — is how fan look the MCU to interchange and adapt . They expect us to be inspired by the cartoon strip as oppose to being slavishly devoted to them . "
Fans will see Downey don his Iron Man wooing once more whenAvengers : Endgamehits field on April 26 , 2019 .