Movie star Angelina Jolie says being pregnant is "great for the sex life".

The actress, who is expecting twins with partner Brad Pitt, says the couple have become "a lot more creative" in bed since she gained her baby bump.

"As a woman you're just so round and full," she told Entertainment Weekly magazine in the US, "so you have fun".

The couple already have four children, three of whom were adopted. Jolie, 33, says that she and Pitt "really don't know" how they will cope with six.

"His mom and dad are on standby to come out and help," she admitted.

"And fortunately we can hire help if we need it, but we're going to try as we usually do to balance it as well as we can."

Power list

Jolie was named the third most powerful celebrity in the world by Forbes magazine earlier this week - with Pitt taking tenth place.

As well as two new children, the actress also has two new movies on the way - Wanted, an action thriller with James McAvoy, and the Clint Eastwood film Changeling, which received its world premiere in Cannes.

Pitt, meanwhile, stars in the latest film by Fight Club director David Fincher, The Curious Case Of Benjamin Button - which is based on a short story by F Scott Fitzgerald.

The couple's twins are due in August, Jolie told Entertainment Weekly.

Two weeks ago, they were forced to deny reports that the babies had been delivered prematurely in France.

Their other children are 6-year-old Maddox, 4-year-old Pax, 3-year-old Zahara and 2-year-old Shiloh.