Hollywood power couple Angelina Jolie and Brad Pitt may soonexchange marriage vows, according to reports. As per OK! Magazine, the couple, who are said to be expecting twins, want to welcome the new additions to the family as husband and wife. "They had an amazing time Oscar weekend, since then, they've been madly in love. The wedding was totally off: They were having so many arguments, but they've finally managed to bury their differences," a source told the magazine. "Angie is expecting twins this fall, so it is making them feel a time crunch. They decided they'd both like to welcome their twin boys to the world as man and wife, which means the wedding has to happen fairly soon. They've both realised how much they want to be together," the source added. The two already have three adopted and three biologicalkids.