Audiences have always loved superhero movies, right the way back to "Superman" in the 1970s. But the genre's popularity has hit new heights in the last decade thanks to the Marvel Cinematic Universe, which has told an ongoing story in over 20 movies and TV shows (so far).
While these projects have raked in huge profits at the box office, some of the stars who have donned the colorful costumes have been vocal about the difficulties that go into making them: From issues with filming against a green screen to getting into makeup, and negative audience reactions.
Here are 13 actors who have been open about struggling with appearing in a Marvel movie.