Jolie can use the passport when she visits the native land of her 4-year-old son Maddox, Stephan Bognar, executive director of the Maddox Jolie project, said Tuesday.
The 30-year-old actress adopted Maddox from Cambodia in 2002. She has a 9-month-old daughter, Zahara, who was adopted from Ethiopia earlier this year.
San Francisco-based WildAid manages the Maddox Jolie project, which promotes wildlife conservation and community development in a former Khmer Rouge guerrilla stronghold in northwestern Cambodia.
Bognar said Jolie was "ecstatic and thrilled" last month when he handed her the passport and an official copy of a royal decree giving her Cambodian citizenship.
"Maddox was there and she showed him" the passport, he said.
Scenes for Jolie's 2001 movie, "Lara Croft: Tomb Raider," were filmed at Cambodia's famed Angkor Wat temple.