Los Angeles: Hollywood couple Brad Pitt and Angelina Jolie are reportedly seeking a therapist to help their eldest son Pax cope with aggressive behaviour.

The couple, who raise six children together, said to have found Pax bullying his siblings.

“He's become something of a bully. He picks on Shiloh, and even his big brother, Maddox. He's having a tough time getting along with his siblings,” a website quoted a source as saying.

“He's having a difficult time with the constant schedule changes and with the fact that people stare at him whenever he's with his parents,” the source added.