Pitt and Jolie in Production Mode

Los Angeles (E! Online) - Brad Pitt and Angelina Jolie have a new joint production in the works
The globe-trotting couple is teaming up to produce a new series for HBO, based on the inner workings of an international aid organization and the stories of humanitarian workers who risk their lives to help others, a spokesperson for the cable network confirmed to E! News.

Pitt and Jolie will serve as executive producers on the project. Scott Burns, who cowrote The Bourne Ultimatum and was a producer of An Inconvenient Truth, will also executive produce and will write the pilot.

The as-yet untitled drama is described as Jolie's "passion." The actress and mother of four has served as a goodwill ambassador for the United Nations Refugee Agency since 2001 and previously starred in 2003's Beyond Borders, about relief workers in countries devastated by war.

The project marks Jolie's first return to HBO since her breakthrough performance in 1998's Gia, which earned her a Golden Globe. Pitt is already working with the network as a producer of the miniseries Undaunted Courage, currently in development.

After spending time in New York this fall, where Pitt was filming the Coen brothers caper Burn After Reading, the Jolie-Pitt clan recently returned to Los Angeles, where Jolie is currently shooting The Changeling with Clint Eastwood.