Angelina Jolie and Brad Pitt expecting daughters

Angelina Jolie and Brad Pitt are set to welcome twin daughters, it has been claimed.

However, despite the couple's joy of adding two more girls to their brood when Jolie gives birth in July, the pair are living in fear because of the actress' recent collapse and her serious medical problems. They are said to be "on edge" as they "prepare for a worst-case-scenario birth early this summer."

"Brad can't wait — he absolutely adores little girls," a family insider tells Star magazine. "And Angelina just loves seeing him and the other kids so excited and happy."

And just before Jolie, Pitt and their four children left for France last month, the Tomb Raider star, 32, suffered a terrifying collapse that left her tearful, weak and panic stricken, fearing her fall may have harmed her two unborn babies, Star magazine claims.

"Angie got out of bed and was halfway across the room when she passed out and fell," says the insider. "Brad heard her hit the floor — hard — and he rushed to her side. She came around pretty quickly, and the medical team that has been traveling with her, a doctor and a nurse, got her back into bed and started checking her vitals."