UPDATE: THEY ARE NOT SPLITTING. IT IS ALL RUMOURS.
This has been coming for a while now. There has been rumors for months now that everything is not peachy between the pair. It has at last come to heads when Brad told Angelina she should get psychiatric help or he is leaving her in return she called him boring, calling him toxic and wants him out of her life.
This was all overheard at a restaurant where the two spent the night in serious discussion. By the next day they went to see solicitors to split their joint fortune and share custody of the children who will remain in residence with Jolie.
The pair came together with massive sexual chemistry and reportedly spent days in bed but after six years and 6 children apparently they have realised they are just to different to be happy together. Brad Pitt was raised traditionally and has always wanted a family and raise them that way. Where Angelina Jolie had a hollywood family with all the ups and downs that entail, she and her brother is abnormally close and she has had bouts of depression Jolie was even committed to a mental home when she was younger.
Since they have begun their relationship she has been unreasonably jealous of Brad's ex Jennifer Aniston which has lead to many fights, some even violent. Brad Pitt wants Jolie to get help, she is too thin and has mood swings, just after she had her twins she started looking to adopt another child. This is not at all what Brad wants, he wants a stable home to raise the children in, living in one place but Angelina refuses to slow down taking on more work and charity. Some say it is her way of coping with the grief of losing her mother.
They look tired, worn out and the fact she just wants more and more children is a problem. Some is speculating if he would return to Aniston but I doubt she would take him back and as for Jolie she is going to live in France while making a film there and where she could have some privacy.
Update:
Close friends of Brad Pitt and Angelina Jolie has stated that the reports that they are splitting is just tabloid rumors. Their reps has also denied that they are breaking up. But who knows, the pair is hardly seen together anymore and it is reasonable to believe that they are hitting a ruff patch in their relationship.
Hollywood :/