There’s BIG trouble brewing with the BRANGIE BROOD!

On the surface, Angelina Jolie and Brad Pitt seemed the picture of happiness with their 12-year-old son Maddox in tow as they reunited for the first time in months at the recent 5th Annual Governors Ball in Hollywood.

But family sources told The ENQUIRER that the superstars’ other kids, led by 9-year-old Pax, are up in arms about not getting equal time with their parents.

What’s more, Maddox wants to get into show business, and sources say the rest of the brood also wants screen time – and the more the better!

Maddox stole the spotlight at the Nov. 16 Governors Ball, where his mom was awarded the prestigious Jean Hersholt Humanitarian Award to honor her work as a special am­bassador for the United Nations.

Addressing Maddox during her speech, Angie said: “I’m not going to cry. I promise. And I’m not go­ing to embarrass you. You and your brothers and sisters are my happiness, and there is never a greater honor in this world than being your mom.”

The gala event “was a great showcase for Maddox,” said an insid­er. “But at home all hell broke loose.

“Angie’s kids are jealous of every bit of attention any one of them gets over the other. And seeing mommy and daddy with Maddox on the red carpet put the rest into mini-diva mode. It was a revolt, and now the household is in an uproar.”

While Pax was the most vocal, Zahara, 8, Shiloh, 7, and 5-year-old twins Knox and Vivienne were all whining and upset, disclosed a close source.

“Film commitments have kept Brad and Angie apart, and when they do get together, Maddox seems to get all their attention,” the source explained.

Brad, who turns 50 next month, has been away from his fam­ily for most of the year, first doing retakes on “World War Z” in England and then promoting the film. He’s also over­seeing publicity for his epic “12 Years a Slave” and shooting “Fury” in Brit­ain.

In the meantime, Angelina, 38, has been focusing on her second directo­rial stint, “Unbroken,” a World War II story filming in Australia.

Brad and Angie shouldn’t be sur­prised by their kids’ behavior, say sources.

As The ENQUIRER previously reported, a full-blown bout of jealousy broke out when Vivienne got the key role of young Princess Aurora in “Maleficent,” a new version of “Sleeping Beauty.”

Even though each of the couple’s children have had an opportunity to appear on film in small roles, Vivi­enne’s big part caused a major rift in the family, revealed an insider.

Now ALL the youngsters are vying for screen time.