Vivienne Marcheline and Knox Léon Jolie-Pitt

People.com has the first pictures of Vivienne Marcheline and Knox Léon Jolie-Pitt! The issue is on sale today Monday.

They are just 3 weeks old, but twins Knox Léon and Vivienne Marcheline are about to take the world by storm.

In an exclusive interview and photos, Brad Pitt and Angelina Jolie offer PEOPLE an intimate look at their growing family.

"It is chaos, but we are managing it and having a wonderful time," Jolie tells PEOPLE of daily life at the Château Miraval in Provence, France, where the couple's four older children – Maddox, 6, Pax, 4, Zahara, 3, and Shiloh, 2 – have been enjoying a summer of outdoor play (hide-and-seek is a favorite) on the château's sprawling grounds.