Angelina Jolie Pitt revealed that her children, Pax, 12, Zahara, 10, Shiloh, 9, and Knox, 7, recorded animal noises for some of the pandas in the animated film.
"They were kind of shy," Jolie Pitt, 40, told Entertainment Tonight of bringing her children on set. "They don't really want to be actors, but I didn't want them to miss the opportunity. They came in, and they had a lot of fun with it."
Kung Fu Panda 3 (out Jan. 29) follows Po (Jack Black) as he reunites with his long-lost father (Bryan Cranston) and works to train a village of pandas to fight against a supernatural villain named Kai (J.K. Simmons).
This isn't the first time a few of the Jolie-Pitt kids have gotten in on the family business.
RELATED: Brad Pitt and Angelina Jolie's Most Glamorous Moments
The mother of six previously told PEOPLE that Maddox, 14, is helping with research for her upcoming film First They Killed My Father: A Daughter of Cambodia, while Pax takes still shots on set.
Madddox also worked as a production assistant for Jolie Pitt's most recent movie, By the Sea, her first onscreen collaboration with husband Brad Pitt in 10 years.