Harry Potter actor Jason Isaacs is amazed his young co-stars have remained grounded while filming the hit franchise - insisting the experience could easily have driven them "off the rails".
Isaacs plays Lucius Malfoy in the wizard movies alongside Daniel Radcliffe, 19, Emma Watson,19, and Rupert Grint, 20, who have grown up in front of the cameras after first appearing in the films as children.
And Isaacs is convinced most child stars end up battling drug or alcohol problems after shooting to fame at such a young age - and he is surprised the trio has managed to remain so humble.
He says, "The problem with Harry Potter is that there is so little controversy. It would be so great for the press if one of them would go off the rails and end up in rehab, but they are, actually, just really sweet guys. What is amazing about them is that they are still respectful and have humility and worth ethic. I have met and sometimes worked with their American equivalents and they have none of those things."
And Isaacs admits that the young stars could potentially enjoy long Hollywood careers, but need never work again because of the success of the Potter franchise. He adds, "They can fall backwards on their mountains of cash."