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."
Having taken British cinemas by storm over Christmas, the excellent family comedy Paddington is finally set to hit US theaters this weekend. If you’re unfamiliar...