Angelina Jolie and Brad Pitt To Become Foster Parents

Angelina Jolie and Brad Pitt are doubtful their love of children can ever be fulfilled - so they are planning to care for foster kids once their own brood grow up.

Jolie and Pitt have three adopted children, Maddox, six, Pax, four, Zahara, three, as well as biological daughter Shiloh, two - and the actress is currently pregnant with twins.

But despite their soon-to-be six-strong family unit, Jolie insists she will always want to have kids around - so she is contemplating opening up her home to care for foster children.

She says, "We keep thinking, 'Is there ever going to be a time when we don't have kids in the house?'

"Maybe we'll eventually start a foster home or something. We have a clinic that handles children so there are ways of looking after kids without actually physically having them in your home and we're doing more and more of that."

And Jolie insists that despite having two babies on the way, she would still like to have more children of her own.

She adds, "I'd like to do it again."