Ben Affleck and Henry Cavill recently spoke on the difficulty of their respective roles in Batman v Superman: Dawn of Justice.

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Affleck and Cavill appeared on ABC's Good Morning America on Tuesday where they discussed the physicality of inhabiting their roles as Batman and Superman, respectively.

"I saw the first movie he was in and I was like, 'Wow, I don't know if I'm going to be in quite that good of shape," Affleck quipped, of Cavill. "He has definitely set a high bar but he also has to be in that high bar because he is you know, an alien."

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While Affleck did not have to reach Superman levels of strength in preparing for the role, he did suggest he was proud of his accomplishments.

"I figured I had a lower bar to reach because I'm just a man after all, but I ended up putting on about 20 pounds of muscle, which is really hard to do in my advanced age," said Affleck, who is 43 years old.

If Affleck thought he had it rough, try being Superman. Cavill spoke of the heroic pose he often makes as Superman, saying it's "sort of screaming on the inside and smiling on the out."

Affleck also said that he really hopes the film does well at the box office.

"I really care about it and I want it to do well," Affleck said. "I got to work with some really talented people and I'm really proud of what we were able to do."

 Batman v Superman: Dawn of Justice is scheduled for release in theaters on March 25.