Baby Jolie-Pitt born

From the AP:

NEW YORK - Nothing was normal about the birth of Angelina Jolie and Brad Pitt’s child, so naturally, neither was their baby’s name.
The child — whose pending arrival created a frenzy of hyperbole making it for some the most awaited baby since Jesus — was named Shiloh, which fittingly means “Messiah” or “Peaceful One.”
Shiloh Nouvel Jolie-Pitt was born Saturday evening — via Caesarean section, according to People magazine — in Namibia where her famous parents had withdrawn for the birth, aided by considerable protection from the African country’s government.

The article goes on to say the couple have two adopted children. Did I miss them getting married? I knew Jolie had two adopted children, but when did Pitt become the father?