Angelina Jolie and Brad Pitt are considering caring for foster kids once their own brood have grown up and flown the nest.

The couple, who already have four children, six-year old Maddox, four-year old Pax, 3-year old Zahara and 2-year old Shiloh, as well as two more on the way, have made no secret of their love for youngsters.

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."