Brad Pitt & Jennifer AnistonBrad Pitt & Jen Aniston: Heading for divorceFor months, Jennifer Aniston and Brad Pitt have kept tight-lipped about their break-up, fuelling media speculation over what caused the rift.

But now, as divorce details are finalised, Jennifer has opened up her heart about the real reasons behind the split.

The Friends star confessed that her fairy-tale marriage to Brad made her feel too insecure.

The 36-year-old said: "Marriage brought up all the kinds of things I pushed to the back-burner - the fear, the mistrust, the doubts, and the insecurities."

"Brad is the kindest person I know and the sweetest goofball on the planet. He helps you with your chair in restaurants and opens the car door for you.

"He's a gentleman and accepted me with all of my crap and dysfunction and insecurities and struggles."

But she says she always felt inferior to the Troy heart-throb, and that her relationship with him went through "rough and nasty" patches.

Despite rumours that she put her career above having a family with Brad, Jennifer told how she longs to have children, saying: "Babies are so magical that I want at least one of my own."

Brad recently said that his love was never enough for Jennifer.

He was quoted as saying: "It was becoming a nightmare.

"When something so good goes so bad, it's awful. Jennifer refused to recognise the problems and she had an inability to let go, always bringing up the good memories. I'm not the bad guy."