Analyzing the Brangelina Brood: How will Pax Thien Fit In?

Now that Angelina Jolie is a mother again, the question on everyone's mind is: how will her kids adapt to yet another tyke in the house?

Gratned, new son Pax Thien was adopted less than a week ago - but that doesn't mean it's too early for Us Weekly to consult with Frank J. Sulloway, author of Born to Rebel: Birth Order, Family Dynamics and Creative Lives.

Let's see what he says about how the latest member of the family is likely to affect life in the Jolie-Pitt household.

Maddox, 5:
As the eldest, he'll be "conscientious, responsible, protective of younger siblings and most likely excel in school."

Pax, 3:
As a middle child, he'll be "agreeable, a peacemaker - and good at wheeling and dealing, since the firstborn has physical dominance."

Zahara, 2:
"Open to experience. And, like Pax, likely to be very agreeable."

Shiloh, 10 months:
The youngest, she'll be "obstinate, extroverted and fun-loving. Many great comedians were the youngest in the family."

So were many plastic surgery lovers.

Anyway, there you have it, readers. Brad Pitt and his lovely partner needn't even nurture these kids.

Their personalities are obviously already set based on their age and pecking order. That should be a burden lifted off any parent.