Uh oh! The veil is being lifted, and it doesn't sound pretty.

Brad Pitt and Angelina Jolie's marriage and subsequent divorce is the subject of a new documentary by filmmaker Ian Halperin, and the investigative journalist has dug deep to uncover the most guarded details of the former couple's private life.

'This is the definitive film about Brangelina and a lot of secrets are going to come out. Ian has covered every cough and spit of their relationship and will reveal the real reasons behind Angelina filing for divorce," a source dished to The Sun.

"The biggest shock will be his claim that the couple were apart for more than a year prior to their break-up," the source added.

The actress filed for the D-word this past September, and the pair have been in a custody battle over their six kids ever since. The World War Z star was investigated by Child Protective Services over alleged child abuse claims, but was cleared by the agency of any wrongdoing.

The actor has been getting more frequent visitation with his brood in recent weeks, after going months without regular contact. "He seems to have a more positive outlook. Things seem much better now ... He can spend more time with them ...He seems much happier. He has missed his kids terribly. The kids are his whole world. It's all he cares about," a source dished to People.

This upcoming tell-all is bad news for Brangie, but we can't wait to see it!