The Oscar-winning actor told the Los Angeles Deputy District Attorney about the revealing conversation.
The Jackson family has also issued a statement.
Leaving Neverland tells the story of two boys who claim they were abused by the hit pop singer.
Alexander Polinsky is the second actor from the show to step forward.
Aerosmith singer famously dated and impregnated a 16-year-old girl and then demanded she get an abortion.
The Lovin’ Spoonful member is out on $35,000 bond.
Pitt allegedly “went wild, screaming and getting physical with the kids” during a flight last week.