On March 15, 2007, Jolie adopted a son, three-year-old Pax Thien, from an orphanage in Ho Chi Minh City, Vietnam. He was born as Pham Quang Sang on November 29, 2003, in HCMC, where he was abandoned by his biological mother soon after birth. After visiting the orphanage with Pitt in November 2006, Jolie applied for adoption as a single parent, because Vietnam's adoption regulations do not allow unmarried couples to co-adopt. After their return to the U.S., she petitioned the court to change her son's surname from Jolie to Jolie-Pitt, which was approved on May 31. Pitt subsequently adopted Pax on February 21, 2008.