EXCLUSIVE: Ben Affleck Says His Kids Don't Get to 'Pick Sides' Between Batman and Superman

While Batman v Superman: Dawn of Justice is looking to settle the longstanding debate between which superhero would beat each other in a fight, star Ben Affleck says that, when it comes to his kids, there's no debate to be had.

"I don't give my kids a chance to pick sides," Affleck told ET's Jennifer Peros at the massive Dawn of Justice premiere at Radio City Music Hall in New York City on Sunday. "They're Batman's kids so they gotta be on Batman's side. Otherwise there's no supper!"

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Although it seems the 43-year-old star's three kids -- Violet, 10, Seraphina, 7, and Samuel, 4 -- whom he shares with his ex, Jennifer Garner, don't need to be convinced. They think their dad's pretty cool now that he's playing the iconic caped crusader.

Although Affleck says he doesn't think the cool factor is going to last much longer.

"I think, give them a year or two and they'll be completely embarrassed by me," Affleck joked. "By the time Justice League comes out, maybe, they'll be embarrassed of me."

The Justice League Part One, set to be helmed by Batman v Superman director Zach Snyder, doesn't hit theaters till Nov. 17, 2017, so Affleck might still have some time to bask in the adoration.

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The two-time Oscar winner also addressed speculation that he had built his own Batcave in his home.

"That's not true, it's just that my son thinks I go to the Batcave when I go out to work," Affleck explained. "So when I come home, he's like, 'Dad, were you at the Batcave?' And I'm like, 'You got it kid, Batcave! You know how it is, I had to go to the Batcave.'"

As for the rumor that he re-wrote some of the Dawn of Justice script while dressed head-to-toe in his Batman costume? Yeah, that apparently didn't happen either.

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The script was written by screenwriter Chris Terrio, who won an Oscar in 2013 for writing the screenplay for Argo, which Affleck directed.

"I have never rewritten him once, and I certainly wouldn't do it in my Batsuit," Affleck explained. "It's like not even comfortable to do fight scenes in, never mind write in."

Batman v Superman: Dawn of Justice hits theaters Friday, March 25.

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