Angelina Jolie and Brad Pitt's son Pax suffers leg injury

Brad Pitt and Angelina Jolie's 12-year-old son Pax is recovering after reportedly hurting his right leg on vacation in Thailand.

Specific details surrounding the injury are unknown, but a source tells People.com Pax was lucky not to break his leg.

The incident occurred while the famous family was enjoying a festive break travelling around Thailand, just days after Brad and Angelina jetted to neighbouring Vietnam for a romantic getaway of their own.

The Hollywood superstars recently moved their brood of six to Cambodia, where the actress-turned-filmmaker is shooting her new movie First They Killed My Father: A Daughter of Cambodia, adapted from human rights activist Loung Ung's memoir about the Khmer Rouge genocide in the south-east Asian country during the 1970s.

Pax and his big brother Maddox, who was adopted from a Cambodian orphanage in 2001, recently joined mum at work on the new film, with the 12-year-old gaining experience in the photography department, while Maddox, 14, helped with research.

"Pax is doing a lot of the stills (photography)," Angelina told People magazine last month (Nov15). "The whole movie is from a child's point of view."

Maddox previously worked as a production assistant on his mother's film By The Sea, which also featured his dad Brad Pitt, but Angelina made sure the youngster was kept away from the set whenever his parents were filming uncomfortable scenes.

"Every time we had a fight scene or sexual scene he obviously wouldn't be near us," she explained. "So he had to work in the parking lot. But he read the scenes of the day - I didn't even know! One day he came up to me and said, 'Really interesting script, Mom'."

Angelina and Brad, who wed last year (14), are also parents to four other children - Zahara, Shiloh, and twins Knox and Vivienne.