Angelina Jolie hires her son Maddox to work on the set of their new film

Los Angeles - Angelina Jolie and Brad Pitt's eldest son is working as a production assistant.

The 39-year-old actress has hired Maddox, 13, to work on the set of their upcoming movie, By The Sea, in Malta.

The brunette beauty, who is directing Brad in the film, decided to give him a job after he spent a lot of time on the set of her movie Unbroken in Australia earlier this year.

The teenager was spotted wandering around the set, observing the activities and talking to the actors while in Sydney, Australia.

Angelia is very close to her six children - Maddox, Pax, 10, Zahara, nine, Shiloh, eight, and six-year-old twins Vivienne and Knox, with her husband - and they all pitched in for two weeks to organise her wedding in the South of France earlier this year, and even helped the couple write their vows.

She told Vanity Fair magazine: "They did not expect us never to fight, but they made us promise to always say 'Sorry' if we do. So they said, 'Do you?.' and we said, 'We do!'"

She said: "We were all going to have a wedding. There was no cake, so Pax made a cake. The kids made little pillows for the rings, and Knox practiced (being a ring bearer) with an acorn that kept falling off the pillow. Brad's mom (Jane Pitt) went and picked some flowers and tied them up."