Brad Pitt is on his way to becoming Pax’s official daddy.

As expected, partner Angelina Jolie filed legal papers to change the name of her newly adopted son to Pax Thien Jolie-Pitt.

Angelina adopted Pax, now 3, last month from a Ho Chi Minh City orphanage.

A legal petition was filed Monday in Los Angeles County Superior Court by Angelina to include “the last name of her partner” Brad Pitt.

Break-up rumors, be gone!

Here is one of the last pictures of Pax Thien Jolie (front and center) taken in February 2007, shortly before adopted by Angelina Jolie. Pax is posing with other children of from Tam Binh Orphanage in Ho Chi Minh City, Vietnam.

PAX SIGHTING!

New mom Angelina Jolie and 3-year-old son Pax Thien Jole were reportedly spotted relaxing by the Park Hyatt Hotel pool in Ho Chi Minh City last Saturday, March 17. (It could actually be the translator Angelina hired and/or maybe the boy isn’t even Pax. The pictures are small, so it’s hard to tell.)

Earlier, Angelina was seen carrying Pax into the hotel with her security officer Mickey Brett right beside them.

At that time, the adoption process was complete and Angelina was expected to meet with U.S. Embassy officials to apply for a visa for Pax.

For a more thumbs of Angelina and Pax playing by the pool, CLICK HERE! The link isn’t working, you guys overwhelmed their servers!

Angelina Jolie carries son Pax aboard a private Gulfstream jet en route to Los Angeles at Noi Bai International Airport in Hanoi, Vietnam on Wednesday.

Angelina’s personal security Mickey Brett carried a napping Maddox on board. Another member of her security team carried a napping Zahara onto the jet.

More pictures of Angelina boarding her private jet, CLICK HERE!

UPDATE :: One inside photo from Hello! reveals Maddox and Pax sleeping beside one another in the same bed. It’s the cutest thing ever.

Angelina Jolie has completed her adoption of 3-year-old Pax Thien Jolie from Vietnam. The mother-of-four has left the capital Hanoi, where she obtained Pax’s visa to take him home to L.A. The family departed from Noi Bai Airport via a Gulfstream jet.

Said Angelina on making Pax’s transition as smooth as possible: “It will take him a while to realize he has a family and that his new life is permanent and that it won’t keep changing.”

Here’s People Magazine’s just-released cover for the week:

Angelina Jolie debuts her new son, Pax Thien Jolie, in Ho Chi Minh City for the first time since his adoption last week. The mother of four was joined in Vietnam by a welcoming committee: big brother Maddox, 5, and little sister Zahara, 2 (10-month-old Shiloh was home with dad), as the 3-year-old now joins the world’s most famous multicultural family.

And here’s a great recent quote from orphanage director Nguyen Van Trung on the similarity between Pax and Angelina?

(laughs) I think he is like Brad Pitt rather than Jolie. Sang Pax is as naughty and smart as any character played by Pitt. Brad Pitt is very easy. Last year when he came here, he asked me where the restroom was and I showed him the way to a public restroom. And he walked straight there.”

PAX is like PITT!

As just reported, here is the exclusive Hello! magazine cover of new mom Angelina Jolie and Pax Thien Jolie. This issue will provide an “intimate glimpse of Angelina as she arrived in Vietnam to pick up her new adopted son Pax Thien last week.”

Here are some highlights from Angelina’s intimate interview with Hello!:

• On her son’s kindness: “He is a very serious, very sweet little boy.”
• On Pax coping with his new life “You can imagine what courage it takes to be in all new surroundings with new people and a new language. He is very strong.”
• On being a devoted mom: “I will stay at home to help Pax adjust to his new life. I have four children and caring for them is the most important thing for me at the moment. I am very proud and happy to be their mother.”
• On strengthening bonds with Pax: “We are slowly beginning to build his trust and bond but it will feel complete only when we are all together.”

And according to a Hello! press release, there will be “breathtaking spread features [of] young Pax playing and napping with his new siblings.” We can look forward to a great photo spread of Angelina, Pax, Maddox, and Zahara.

Hello! reports that once they fly back to L.A., Pax will meet his youngest sister, Shiloh, and dad Brad Pitt.

People magazine will definitely be publishing Angelina Jolie and newly adopted 3-year-old son Pax Thien Jolie on this week’s cover, out this Friday.

But Hello! magazine’s readers will be able to pick up their copy this Thursday. Angelina tells Hello!, “He is a very serious, very sweet little boy.”

Here’s the press release from Hello!:

When they pick-up the copy of Hello! arriving on newsstands starting this Thursday, Hello! readers will catch an exclusive and intimate glimpse of Angelina Jolie as she arrived in Vietnam to pick up her new adopted son Pax Thien last week.

Hello!’s breathtaking spread features young Pax playing and napping with his new siblings. As Hello!’s exclusive photographs show, he has been welcomed as the latest member of the growing Jolie-Pitt clan, able to claim as siblings a brother and two sisters and two of the world’s most glamorous activists as his parents.

Said Angelina, “You can imagine what courage it takes to be in all new surroundings with new people and a new language. He is very strong.”

Angelina Jolie carries her newly adopted son Pax Thien Jolie, 3, as she rushes to a VIP room at the Tan Son Nhat airport on Morning morning in Ho Chi Minh city, southern Vietnam.

The pair was escorted under a big umbrella held by her personal security officer Mickey Brett.

According to Us Weekly, the mother-of-four checked out of their hotel in Ho Chi Minh City at around 2 p.m. and left behind their toys to be given away to needy children.

The Oscar-winning actress and her children — Maddox, Pax, Zahara, Shiloh – are traveling to Hanoi, the Vietnamese capital, to complete the procedures necessary to take Pax to his new home in the United States.

Angelina is expected to meet with U.S. Embassy officials Tuesday to apply for a visa for 3-year-old Pax. Once the visa is issued, she can take him to L.A. She is expected to leave Hanoi on Wednesday.

How cute does Pax look wearing his hat backwards? What a punk. I love it!!

Is that Angelina’s assistant Holly Goline in the bottom-left?