"Spider-Man is big in our family," Pitt, 46, told PEOPLE at the New York premiere of the animated superhero film Megamind on Wednesday. "The kids think he's the coolest. If there was one superhero they would want me to play, that would be the one. I'd score big with them."
But Spider-Man was already taken. So, Pitt took the role of Metro Man in Megamind, and brought sons Maddox, 9, and Pax, 6, to the New York premiere on Wednesday to see what they thought.
"I'm sneaking in the boys tonight," said Pitt, mentioning too that Zahara, 5, Shiloh, 4, and twins Knox and Vivienne, 2 (who are "talking a lot and singing") are in Budapest, where their mom Angelina Jolie is directing her first feature. "I think they will like it, but they are tough critics. Will Ferrell is very popular in our house, so the boys will get a kick out of that."
He added: "Hopefully they will think Dad's really cool and better than Spider-Man."
Pitt says he took the role "for my kids. They liked the story, and I liked it." These days, he adds, the children are always top of mind when he and Jolie consider film work.
"Every role we choose now, we choose it for the kids," he says. "Will the kids like it? Will they like it when they are young adults? Or is this a good location for the family? That's it."