We're shocked Angie allowed this!

Brad Pitt spent his 55th birthday hanging out with his kids at home, People reports.

The mag claims "several" of his children slept over on Monday night, but they don't specify which ones. Rumor has it the actor's relationship with eldest son Maddox is all but over, so something tells us he skipped out on the celebrations.

"The kids arrived at Brad's house on Monday afternoon for a sleepover. Some of them were picked up at 12:30 p.m. on Brad's birthday—Tuesday—and taken back to Angelina's. Some of them stayed for more time with their dad," another insider dished to E! News.

"It was a huge deal for Brad and something he has wanted for a long time. It was the first time they had spent the night and meant the world to him. It was a great birthday present and he's looking forward to spending holiday time with them in the coming days," the source added.

As for the ongoing custody battle between the exes?

"There's an arrangement in place but it's not a permanent agreement, and there's a long road ahead. All Brad cares about is the kids, they're his number one priority and he's focusing on them," the source revealed.

It seems Papa Pitt is back in his family's good graces!