Angelina Jolie has confessed for the first time that she fell for Brad Pitt while he was still married.The 31-year-old actress says when they first met at a production meeting for their film 'Mr. and Mrs. Smith' in 2003 she was "content to be a single mom"and he was with "his best friend, someone he loves and respects", his wife of four years Jennifer Aniston. However, the couple grew close during filming, although Angelina insists there was no romance until Brad, 42, split from Jennifer in 2005. She revealed to America's Vogue magazine: "We ended up being brought together to do all these crazy things, and I think we found this strange,friendship and partnership that kind of just suddenly happened."The 'Tomb Raider' star admits that just a few months into shooting she realised she was falling for the married actor, and insists the feeling was mutual. She added: "I realised, 'God, I can't wait to get to work.'"Whether it was shooting a scene or gun practice, anything we had to do with each other, we just found a lot of joy in it. We just became kind of a pair."It took until, really, the end of the shoot for us, I think, to realise that this might mean something more than what we'd earlier allowed ourselves to believe."Angelina also issued a plea to Jennifer, saying she would love to sit down and have a chat with the former 'Friends' actress. She revealed she had met her briefly once, but added: "It wasn't a proper meeting. We've passed each other and said, 'Hi' and shook hands."But not a real sit down and talk kind of meeting. That would be her decision and I'd welcome it."The couple's first child together, Shiloh Nouvel, was born in May this year,while Brad shares joint custody of Angelina's adopted children, Maddox, five and Zahara, who is nearly two.