Only the most brave and the bold of performers can take on the challenge of playing DC's iconic heroes. Fortunately, incredible actors such as Grant Gustin put themselves forward for the challenge, embodying characters such as Batman and The Flash from the moment that the cameras started rolling.
Join us as we take a look at some of the best #DC auditions that the internet has to offer. While not all of these actors snagged the role that they were gunning for, each ultimately still played a crucial role in the world of DC, bringing to life some of our favorite superheroes and villains.
Grant Gustin's Screen Test For Barry Allen ('The Flash')
There was a lot of pressure riding on #GrantGustin's audition for Barry Allen, but since making his debut on #Arrow, it's become impossible to imagine anyone else taking on The Fastest Man Alive in #TheFlash.
Amy Adams's Screen Test For Rachel Dawes ('Batman Begins')
Before Katie Holmes and Maggie Gyllenhaal both took on the role of Rachel Dawes in Christopher Nolan's Dark Knight trilogy, Amy Adams shot a screen test opposite Christian Bale's #Batman. Adams would have been fantastic in the role, but it all worked out for the best, as she was then later cast as Lois Lane in the first #DCEU Superman film instead.
Cillian Murphy's Screen Test For Bruce Wayne ('Batman Begins')
As the first villain to terrorize Batman in Christopher Nolan's Dark Knight trilogy, the Scarecrow has been etched into the minds of DC fans everywhere. While this is largely thanks to #CillianMurphy's chilling portrayal of Dr. Jonathan Crane, audiences may be surprised to discover that the Irish actor originally auditioned for the role of Batman himself.
Christopher Reeves's Screen Test For Clark Kent ('Superman')
Plenty of actors have been lucky enough to play Superman over the years, but out of every performer cast in the role, Christopher Reeves is the one who truly makes you believe that a man can fly. That's obvious from the very first time that Reeves wore the suit as part of this historic screen test.
Margot Kidder's Screen Test For Lois Lane ('Superman')
Superman may be the world's most famous hero, but his story just isn't complete without Lois Lane and the same could be said for Christopher Reeves, whose performance just wouldn't be as powerful without Margot Kidder by his side.
Joe Manganiello's Screen Test For Deathstroke ('The Batman')
Auditions and screen tests usually appear long after a film has debuted in cinemas, so it came as a shock when Ben Affleck deliberately shared this clip of Joe Manganiello as Deathstroke, revealing to the world who Batman would fight in his next solo film.
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These DC screen tests provide us with a fascinating glimpse into the raw talent that stars in our favorite shows and movies. Whether each actor nails the part they're aiming for or not, it's undeniably interesting to consider what could have been. After all, who the hell would have thought Cillian Murphy had a chance at playing Batman?
Which DC audition tape was your favorite? Let us know what you think in the comments section below!