Brad Pitt jetted off to Las Vegas to celebrate his 48th birthday Saturday night. But it wasn't a wild boys' weekend with friends, the actor went along with Angelina Jolie and the kids for an evening at the new Michael Jackson tribute show, The Immortal World with Tour Cirque du Soleil at Mandalay Bay.

The couple and their six children showed up unannounced but were treated to VIP seating. The family was whisked out after the show and headed back to LA shortly after.

Happy birthday, Brad!