With rumours that Angelina Jolie and Brad Pitt are expecting their seventh child, proud grandfather Jon Voight has insisted that his grandchildren will become huge Hollywood stars like their parents.

The veteran actor, 73, has a "feeling" that the children, some of whom have been adopted will grow up to become esteemed stars.

Talking to E! News, Voight said: "I have no doubt". The 'Mission Impossible' actor is grandfather to Maddox, 10, Pax, eight, Zahara, seven, Shiloh, five, and three-year-old twins Vivienne and Knox, and spends time with them since making up with his daughter Angelina after a family feud.

"Hollywood should be afraid of them! These guys are really something," he continued.

But even if they don't want to keep up the family business, Voight will be supportive of whatever career his grandchild decide.

"I try to give them support as Brad and Angie do," he said. "They really let these kids be who they are."

Voight previously said in an interview that his Oscar-winning daughter had "serious mental issues", which led to the feud erupting and she was scared of losing her son Maddox.

"They could have decided he's right, she's crazy, let's remove that child from her custody, and that's unforgivable," Angelina said at the time. "My father and I don't speak. I don't believe that somebody's family becomes their blood. Because my son's adopted, and families are earned."

Angelina, Brad and their kids...