The Jolie-Pitt kids are growing up so fast!

Angelina Jolie stepped out with three of her children, Pax, 12, Zahara, 11, and Shiloh, 9, at LAX airport on Monday, March 7 — and we can't get over how big her kids are!

angelina jolie kids splash

Shiloh, Zahara, Angelina and Pax on March 7.

Angelina, 40, and her husband, Brad Pitt, 52, previously adopted daughter Zahara from Ethiopia in July 2005 and son Pax from Vietnam in March 2007. The couple welcomed daughter Shiloh in May 2006.

RELATED: Angelina Jolie on Motherhood — "It's Strange, I Never Wanted to Have a Baby"

The Mr. & Mrs. Smith stars are also parents to son Maddox, 14, whom they adopted from Cambodia in March 2002, and twins Knox and Vivienne, both 7, whom they welcomed in July 2008.

Click through the gallery below to see all the Jolie-Pitt kids through the years!