"Fortunately, they didn't seem to have those preconceived notions," he said. "In America child actors are treated like actors first and then children, whereas in England they're treated as children first and then actors.

"So if you're getting too big for your boots no one will have any worries about saying shut up, whereas in America I think possibly people pander too it more than is healthy," he said. "There's not a huge amount of sycophancy in my life."