Angelina Jolie walks with Pax Pitt-Jolie, who's carrying a large purpe stuffed animal at JFK Airport in NYC on June 24, 2013. Credit: Splash News

Angelina Jolie's son Pax Jolie-Pitt brought along a not-so-little friend for a recent flight: A giant purple stuffed animal! Clutching his beloved doll, the nine-year-old -- the second eldest in the Jolie-Pitt clan -- was alongside his famous mother, 38, as the pair touched down at NYC's JFK airport on Monday, June 24. (Jolie was in the Big Apple to address the United Nations in her capacity as special envoy for the UNHCR.)

The pair were then snapped late that night in L.A., with Pax still holding onto his monkey-like purple friend. Pax and his five siblings have been traveling the globe even more than usual lately, escorting their father Brad Pitt for worldwide premieres of World War Z. The entire crew was together earlier this month for Jolie's 38th birthday; they celebrated the milestone (and no doubt Jolie's recovery following her preventative double mastectomy earlier this year) with a sushi dinner in Berlin.

Pax's big brother Maddox, 11, makes a surprising cameo in the zombie epic. "He gets shot in the head . . . multiple times," Jolie's fiance Pitt, 49 recently revealed. "But he gets double tapped. I don't know what that says about me as a parent." The star added that both Pitt and Maddox "love" the PG-13 flick.

The actor's young costar Fabrizio Zacharee Guido also bonded with Pax and Maddox on set. "They're so much fun. They're just normal kids," Guido said.