Brad Pitt  arrived at the airport in Hungary with Knox and Vivienne in his arms this morning. The adorable twins took a cue from their fashionable dad and covered up their long hair with hats for the journey. Brad's taking a break from filming Moneyball  to join the rest of the family in Budapest, where Angelina Jolie  is working on her first directorial project  and Maddox, Pax, Zahara, and Shiloh are already enrolled in school . Brad waved goodbye to fans in Boston yesterday  before bringing his two youngest kids on the long plane flight to meet up with their siblings and mom. The Jolie-Pitts are no strangers to international living, and hopefully their time in Eastern Europe will bring some sweet sightings like the Spring spent in Venice .