British actor Hugh Bonneville says fans of Paddington Bear books should feel very safe about the big screen adaptation which stars Nicole Kidman as the villain.
Bonneville plays Mr Brown and Kidman is Millicent, an evil taxidermist, in Paddington to be released in late 2014.
Colin Firth will provide the voice of the CGI generated Paddington Bear.
Harry Potter producer David Heyman has produced Paddington, the character's creator Michael Bond wrote the storyline which was adapted into a screenplay by the movie's director Paul King.
Bonneville says the production team was on a hiding to nothing in bringing such an iconic character to life but they have done Paddington Bear justice and fans will not be disappointed.
"We are running a big risk, but lucky we have Michael Bond who wrote the books and he is in the film in a cameo so we have been held to ransom," Bonneville told AAP with a laugh.
"It's been modernised and it's set in the present day and it has all the elements of the original stories, the charm, the wonder, the innocence and all the marmalade Paddington had."
"It's a charming script ... one feels we are in safe hands."
Bonneville managed to appear in the movie in-between seasons of Downton Abbey in which he plays Robert Crawley, Earl of Grantham.