Voice actor Angelina Jolie poses during a photocall for the animated film "Kung Fu Panda" by directors Mark Osborne and John Stevenson at the 61st Cannes Film Festival May 15, 2008. [Agencies]

Angelina Jolie says being pregnant is great for her sex life. The Oscar-winning actress - who is expecting twins with partner Brad Pitt - revealed her ever-expanding stomach means they have to make love in a variety of positions.

She said: "It's great for the sex life. It just makes you a lot more creative. So you have fun, and as a woman you're just so round and full." Angelina - who has three adopted children, Maddox, six, Pax, four, Zahara, three, as well as two-year-old biological daughter Shiloh, with the 'Fight Club' star - admits the couple were surprised when they discovered they were having twins.

She said: "We weren't expecting twins. So it did shock us, and we jumped to six children quickly. But we like a challenge." The 'Wanted' actress, who is due to give birth within the next couple of weeks, is determined to make sure the other kids don't feel left out when their new siblings arrive.

She added to Entertainment Weekly magazine: "They're old enough to feel included to change diapers themselves, to feed bottles themselves, like if I pump into a bottle. We're trying to find ways where it can be a fun group thing. Everybody gets special time so we can make sure we know where they're at."