Brad Pitt and Angelina Jolie split for 'health of family' but is Marion Cotillard real reason behind divorce?
Speculation is growing that Hollywood golden couple Angelina Jolie and Brad Pitt are divorcing over his alleged relationship with a co-star.
However, other sources have cited Pitt's parenting style and love of the Tinseltown lifestyle.
The couple, known collectively as Brangelina, married in 2014 after 10 years together.
Robert Offer, Jolie's lawyer, said she had filed for the dissolution of the marriage "for the health of the family".
Jolie cited irreconcilable differences in legal documents filed on Monday, the celebrity news website TMZ said.
Pitt said he was "very saddened". In a statement to People magazine, he added: "I am very saddened by this, but what matters most now is the wellbeing of our kids. I kindly ask the press to give them the space they deserve during this challenging time."
There were reports last night that Jolie had hired a private investigator after she suspected he was cheating with Marion Cotillard, his co-star in the upcoming romantic thriller Allied.
"She hired a private eye because she felt that he was fooling around with her on the set, and it turns out he was - and that was the final straw,'' a source told the New York Post.
However, TMZ said that its sources were certain that an affair was not the grounds for divorce.
It reported that Jolie believes that her husband's alleged drinking and cannabis smoking is affecting the children, and that he has an anger problem.
They first met when they played married spies in Mr And Mrs Smith, when Pitt was still married to Friends star Jennifer Aniston.
Jolie is asking for physical custody of the couple's six children - Maddox, Pax, Zahara, Shiloh, and twins Knox and Vivienne, the website claimed. The Maleficent star is being represented by divorce lawyer Laura Wasser, who helped in her divorce from Billy Bob Thornton and is representing Johnny Depp in his divorce from Amber Heard.
Angelina and Brad married in private at their chateau in France just two years ago. They had waited for gay marriage to become legal, with Pitt telling Esquire magazine in 2006: "Angie and I will consider tying the knot when everyone else in the country who wants to be married is legally able to."
Their ceremony included all their children, including adopted offspring Maddox, Pax and Zahara and their daughter Shiloh and twins Knox and Vivienne.
Jolie's Atelier Versace gown featured dozens of designs from her children's drawings sewn into the dress and veil, and the children served as ring bearers and threw flower petals.
Jolie was previously married to Thornton and British actor Jonny Lee Miller.
Since Mr And Mrs Smith, the couple have appeared on screen together in By The Sea, a film written and directed by Jolie and produced by Pitt, in which they played a glamorous couple whose marriage is in crisis.
Before they began filming, Jolie told the Radio Times: "It feels a little daunting. We haven't worked together for 10 years.
"But all of the reasons why people say that we should be scared of it, we feel that's exactly why we have to do this - because we can. So we're going to go boldly."
In May 2013, Jolie had a preventative double mastectomy after tests showed that she carried the BRCA1 cancer gene.