Jason Isaacs praises young Potter stars for staying grounded and humble

English actor Jason Isaacs has nothing but praise for the young actors of Harry Potter, saying they have managed to stay 'grounded' and 'humble' despite their fame.

Isaacs, 47, who played Lucius Malfoy in the Potter series, had starred alongside Daniel Radcliffe, 21, Emma Watson, 20, Rupert Grint, 22, and Tom Felton, 23.

Watson is currently studying at America's prestigious Brown university, while Radcliffe has enjoyed stage roles on Broadway and London's West End.

Isaacs is convinced the secret to their continued success is their grounded start in the Potter movies — and he's pleased they have avoided the fate of many troubled former child actors.

"I've known some child stars in America who've been enjoying films and then the world has really corrupted them because they're exposed," the Daily Express quoted him as saying.

"These guys [the Harry Potter stars] have been behind closed doors in this big family at least, making these films for a decade.

"They're emerging fully formed. They're adults, they're grounded, they're humble, they're really talented and they're a tribute to everyone who's been surrounding them, and their families.

"They're old enough and solid enough that nothing will knock them off their feet," he added.