Natalie Portman goes heavy on the accent

V for Vendetta star Natalie Portman says she got so carried away learning a London accent for the movie that she could not stop using it.

The 24-year-old spent a month working with a dialect coach to get her voice just right for the role.

"I stayed in the accent all the time," she said. "They told me that's the best way to get the tune and rhythm. But then my mum said, 'Really, Natalie, enough already. This is crazy'."