Both inside and outside the Marvel Cinematic Universe, Marvel has been responsible for some truly incredible on-screen castings that have been all but forgotten. The Marvel Universe is practically filled with characters, and with an increasing number of them being adapted to the screen, appropriate castings must be found. In a visual sense, casting these roles is often relatively straightforward: actors of a certain height, build, hair color, or other defining qualities are often considered first and foremost. However, something else makes a casting truly perfect, and it's often difficult to define.
