9. Black Widow (The Avengers)
They might look cool and stylish on screen, but most superhero costumes aren't a lot of fun to wear, according to the actors who wear them. Almost every Avengers star complained about their outfit during the filming of the first movie, with some even having their own personal air-conditioning units hidden under their costumes to keep cool.
Scarlett Johansson, who plays Black Widow in the movies, complained that she drew the shortest straw of all. On the outside, her skintight black suit doesn't look too uncomfortable, but Johansson revealed that the one-piece outfit was unbearably hot.
Johansson said that as soon as the cameras stopped rolling, every actor couldn't wait to get out of his or her suit, adding that she wore nothing underneath hers and would sweat buckets during the shooting of an average scene. Johannson even compared her outfit to a wetsuit and revealed she actually suffered slight hallucinations during the film of one fight scene due to how hot she'd gotten.