Charles Roven, producer of the highly awaited film "Batman v Superman," admits that Ben Affleck was always the first choice in taking on the role of Bruce Wayne/Batman.

In an interview with The Hollywood Reporter, Roven explains what drove him to make the controversial casting decision that everyone is talking about.

"He was the first guy we went to. That's who we wanted," said Roven about Affleck having everything they were looking for. "We knew that we wanted a very mature Batman, because we wanted to juxtapose him with this very young Superman. So we wanted a guy who was tougher, rugged, who had signs of life, who had lived a hard life, and we wanted the guy to have chops, for sure. So when we went down that list, there just weren't a tremendous number of guys who could carry that."

Another defining factor was surprisingly very simple -- they needed a tall actor to fill Batman's shoes.

"We also wanted a guy with big stature. Ben is 6'4. Henry Cavill is 6'1. We wanted Batman to tower over Superman. Not hugely, not like a basketball player. Superman needed to 'look up' to Batman. We wanted that dynamic, and Ben could do that, easily," Roven pointed out.

Roven, who works very closely with Zack Snyder, the director of "Batman v Superman," says that he was the first one to reach out to Affleck.

Affleck, who has already demonstrated great dedication to his new role, has changed the minds of many critical Batman fans who weren't too sure about him. "He's much more of a social animal in the Bruce Wayne incarnation, but he's also an extremely rough guy in the Batman incarnation -- very, very, very rough, " Roven added.

When it comes to getting ahold of Affleck, Charles admits that Snyder and himself already had a relationship with Warner Bros. (DC Comics are at Warner Bros.) Ben had recently won an Oscar for "Argo", which was a Warner Bros film, "so it wasn't too difficult to reach him."

What do you think about Ben Affleck as Batman?