Pax is officially a Jolie-Pitt.
Angelina Jolie and Brad Pitt appeared before the L.A. County Children's Court in Monterey Park, Calif., on Wednesday, where a judge finalized the 4-year-old's adoption papers, TMZ reports.
A rep for the couple has confirmed the news.
The adoption was a long process for the family — which includes Maddox, 6, Zahara, 3, and Shiloh, 21 months — who first welcomed Pax into their lives last March when Angie, 32, adopted him solo from a Vietnamese orphanage.
Maddox and Zahara, who were also at first just adopted by the actress from Cambodia and Ethiopia, respectively, officially became Jolie-Pitts in January 2006 when Brad's petition to legally adopt them was approved.