Actor Brad Pitt says he is delighted Angelina Jolie is still a "bad girl".

The 'Moneyball' actor insists his partner, with whom he raises six children, has not totally curbed her formerly wild ways, but he said she now likes to keep private, Showbizspy online reported.

"She's still a bad girl. Delightfully so. It's not for public consumption," he said.

The couple have always take their children — Maddox, 10, Pax, eight, Zahara, seven, Shiloh, five, and three-year-old Knox and Vivienne — with them wherever they are in the world and the 48-year-old actor insists their brood are comfortable with their nomadic lifestyle.

"They're quite used to a bit of jetlag and moving to a new location, as long as we're together. So the home's always intact. They've got to pack their own bags, and they're responsible if they leave their chargers behind, and so on and so forth," he added.

The 'Tree of Life' star even credits his family for improving his skills as an actor because he no longer worries so much about his professional life.

"[My work has] gotten better because I worry less about it. I mean, it's not as important as family."