It seems carrying twins is proving quite a drag for pregnant Angelina Jolie.

The 32-year-old actress is said to be suffering from a form of diabetes that develops during pregnancy.

She's also dealing with painful swelling caused by fluid build-up and her shoes have gone up by half a size, it has been claimed.

"Angie has gestational diabetes. She found out about a month ago and has been trying to keep it under wraps," a source told US magazine Star. "She's been seeing a nutritionist about it — frequently."

The Tomb Raider star is also “constantly tired” from taking her four other kids to Texas, where partner Brad Pitt, 44, is filming Tree of Life.

"She's sick and irritable and feels heavy and weak," said the source.

Gestational diabetes usually begins in the second half of pregnancy and goes away after the baby is born.

It can develop in a woman who has not previously had the condition and affects around two percent of pregnant women.

It can lead to problems for mother and baby if it isn't properly controlled with diet and exercise.

Sufferers are more likely to develop gestational diabetes in future pregnancies, and are at a higher risk of developing type 2 diabetes later in life.

In January, it emerged Angelina and Brad were expecting boy and girl twins.

The pair already have three adopted children, Maddox, Zahara, Pax-Thien, and a biological daughter, Shiloh.

Angelina, previously married to British actor Jonny Lee Miller and Billy Bob Thornton, was said to have cancelled a long-scheduled trip to Europe when she found out about her pregnancy.

Source