Angelina Jolie and Brad Pitt have revealed they will allow their children to be hands-on with the as-yet-unborn twins, giving Maddox, Pax, Zahara and Shiloh the opportunity to feed the new additions, as well as change their diapers.

Jolie admits she was stunned when she discovered she was expecting two babies at once, expanding her brood of adopted and natural kids from four to six overnight.

She tells Entertainment Weekly: "We weren't expecting twins... but we like a challenge.

"(Brad's) mom and dad are on standby to come out (to France) and help."

And she's determined to make sure her other kids are included in the twins' life from day one: "They're old enough to feel included, to change diapers themselves, to feed bottles themselves.

"We're trying to find ways where it can be a fun group thing... Everybody gets special time."

Jolie is expected to give birth to the twins at an exclusive Provence wine estate she and Pitt have hired for the summer.

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