The final insult: Brad Pitt confesses he DID fall in love with Angelina while married to Jennifer Aniston

After years of speculation, Brad Pitt has finally admitted he fell in love with Angelina Jolie while he was still married to Jennifer Aniston.

Rumours swirled around Pitt and Jolie while they were filming Mr & Mrs Smith in May 2004 - seven months before he split from the former Friends star.

In the new issue of Rolling Stone magazine, Pitt reiterates Jolie's recent confession that they fell in love while making the movie.

After being asked why the action film is his favourite film, he explained: 'Because you know... six kids. Because I fell in love.'

Complicated: Brad Pitt admitted he 'fell in love' with Angelina Jolie on the 2004 set of Mr & Mrs Smith - while he was still married to Jennifer Aniston

Pitt's revelation comes two months after Jolie told the New York Times that she fell for him while making the movie.

Mr. and Mrs. Smith" (2005)

Where we fell in love: Brad and Angelina in Mr & Mrs Smith

Referring to their children watching the film, she said: 'Not a lot of people get to see a movie where their parents fell in love.'

Her recent claims appeared to contradict the couple's repeated denials that they only started dating after he split from Aniston.

In the early days of their relationship, Jolie said: 'To be intimate with a married man, when my own father cheated on my mother, is not something I could forgive.'

Pitt and Jolie's relationship was outed in the media in April 2005 - three months after his split from Aniston - when they were photographed holidaying together in Kenya.

They eventually confirmed they were a couple in December that year when Pitt announced he was adopting Jolie's adoptive children, Cambodian Maddox and Ethiopian Zahara.

Now, three years on, the Hollywood couple are parents to six children - three adoptive and three biological.

As well as seven-year-old Maddox and three-year-old Zahara, they are also parents to Vietnamese Pax, five; Shiloh Nouvel, two; and twins Knox and Vivienne, five months.

Last month, Aniston admitted to being unhappy with Jolie's conduct over some of the details of her relationship with Pitt.

Brad Pitt, right, and Angelina Jolie arrive at the premiere of "The Curious Case of Benjamin Button

Happy together: Pitt and Jolie at the premiere if The Curious Case Of Benjamin Button on Monday night

She told the December issue of U.S. Vogue: 'There was stuff printed there that was definitely from a time when I was unaware that it was happening.

'That stuff about how she couldn't wait to get to work every day? That was really uncool.'

Rolling Stone

The full interview with Pitt is in the new issue of Rolling Stone magazine

In the Rolling Stone interview, Pitt also admitted he has started worrying about his mortality after filming The Curious Case Of Benjamin Button, about a man who ages backwards.

He said: 'Angie and I do not fight anymore.

'What occurred to me on this film, and also with the passing of her mother [actress Marcheline Bertrand in 2007], is that there's going to come a time when I'm not going to get to be with this person anymore.

'I'm not going to get to be with my children anymore. Or friends, people I love and respect. And so, if we have a flare-up, it evaporates now.'

Pitt also admitted he was concerned after his son Maddox Googled the word 'weapons' on the internet.

He said: 'Our seven-year-old was searching the word "weapons" on Google the other day and ended up on some white-supremacist site.

'I'm sure now we're on all kinds of watch lists.'

The full interview appears in the new issue of Rolling Stone magazine, on sale on Friday.

Brad Pitt, left, and his wife American actress Jennifer Aniston

Exes: Pitt and Aniston at the Cannes Film Festival in May 2004 - seven months before their split