'Avengers' Core Six: Now and Then

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Chris Hemsworth, Chris Evans, Robert Downey Jr., Scarlett Johansson, Mark Ruffalo and Jeremy Renner at hand and footprint ceremony

It can be tough to keep up with every movie in the Marvel Cinematic Universe, as 22 films have been released since 2008 and the count is still going. But the core six Avengers -- Iron Man, Captain America, The Hulk, Thor, Black Widow and Hawkeye -- are at the heart of the comic books and film franchise. With their lives spared for Avengers: Endgame and this final chapter focused heavily on this crew, let's take a look at how the actors who play those famed superheroes -- Robert Downey Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson and Jeremy Renner -- have changed since we first met them in the MCU