Angelina Jolie's newest adopted son, Pax Thien Jolie, was issued the US passport and immigration visa he needed to come home and meet his new dad Brad Pitt.

Angelina and Pax arrived in the Vietnamese capital of Hanoi Monday and was given the documentation needed to move Pax to the US. 

"She may leave Vietnam tonight," Vu Duc Long, director of Vietnam's International Adoption Department said.

Pax joins three siblings in the Jolie-Pitt family, 5-year-old Maddox, adopted from Cambodia; Zahara, 2, from Ethiopia; and the couple's biological daughter Shiloh.