According to the actor’s current agreement with his ex, he has custody of the pair for the four-day period between July 8 and 14, which includes the kids’ big day, July 12.
Because of the arrangement, Pitt decided to pass part of the summer in England, where Jolie is busy filming Maleficent.
As Radar reported, Pitt has been fighting for almost two years with Jolie over getting enough access to his family.
The warring former couple’s battle recently came to a bitter head when a judge ordered that their children — Pax, 14, Zahara, 13, Shiloh, 12, and little Knox and Vivenne — must spend significant time between June and Aug. 10 with Pitt.
A judge ruled Maddox, 16, can choose where he wants to live, and he reportedly has decided to stay close to his mom.
A custody review hearing between Jolie and Pitt is currently scheduled for the week of August 13.
Sadly, Pitt’s birthday reunion with Knox and Vivienne will be bittersweet.
One of the last times the dad was publicly pictured with Jolie was in 2016, when the couple celebrated Knox’s eighth birthday at The Griddle Café in West Hollywood