The resemblance to the "People's Princess" is uncanny in the image above

The film's director, Oliver Hirschbiegel, has described Watts as "a truly exceptional actress" who embodied "the warmth, humanity and empathy of such a global icon as Princess Diana."

The Help star Jessica Chastain was originally set for the starring role, but pulled out last year.

Does Naomi Watts make a convincing Princess Diana? Let us know on Twitter or in the comments section below.

Words: Anna Pollitt. Pictures: Splash News and Rex Features

Naomi Watts as Diana: First look