Brad Pitt and Angelina Jolie are hoping to make show business a family affair.

The couple star in the intense romantic drama By the Sea, which Jolie also wrote and directed, but they weren’t the only ones putting in long hours on set. In a 2014 interview withDuJour magazine, Jolie revealed that their eldest son, 14-year-old Maddox Jolie-Pitt, was a production assistant on By the Sea.

“We want to make it a family affair and have the kids running in and out of set,” Pitt told ET’s Kevin Frazier on Thursday at opening night of AFI Fest.

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But there were moments during filming of By the Sea, which centers on a married couple on the brink of disaster, where Pitt and Jolie put on their parental hats.

“There's a few scenes where we had to make him work the parking lot, you know what I mean?” the 51-year-old star said, referencing some of the movie’s more explosive scenes. “But it's fun to see your boy grow up and take on responsibility and [it’s] very nice.”

With Jolie putting on so many hats, the 40-year-old admitted to Frazier that “you have to be a little crazy” to balance mothering six kids, along with directing, writing and starring in By the Sea. But it’s her professional bond with her son that forged during production that inspired the two to continue with new projects.

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“Mad[dox] and I are now producing a film in Cambodia about his country and his history, so we love working together,” Jolie told Frazier on Thursday. “It makes it so much nicer for me to not have to divide my time at home with my time at work.”

“We home school, so now they’re really determined to do all their work so they can finish early on a day and get out to set, so it’s lovely,” she said of her kids’ filmmaking aspirations. “Now, we’re sharing it, so it’s very different.”

The couple also gushed to ET about working together in front of the camera for the first time since 2005’s Mr. and Mrs. Smith.

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“She knows when I'm faking it better than anyone else, but, you know, the actor/director relationship is a very collaborative experience,” Pitt said. “It's really no different, and actually a great pleasure, ‘cause you’ve got to trust your director. Who do I trust more than my wife?”

“As a director, you usually don't want the actor to know everything you're thinking, but as my husband he can kind of look at me," Jolie added. "I can say, ‘It's fine’ and he'll say ‘No, no, you're just saying that.’”

By the Sea opens Nov. 13.

Hit play below to watch Shiloh Jolie-Pitt prank her parents on the set of By the Sea.