Nicole Kidman had to dial down her knife-throwing tricks on the set of new movie Paddington Bear because she was terrifying kids on the set.

The Moulin Rouge! star took lessons to perfect her skills for a scene in the film - but she took things a little too far.

She explains, "They had to bring that down because it was too scary for the kids.

"I get very intense and I learn it properly... and they (producers) were like, 'This is way too much for a kids' movie', but I can twirl a knife now."