Naomi Watts stars as Princess Diana in Oliver Hirschbiegel's upcoming biopic, while Naveen Andrews co-stars as heart surgeon Dr Hasnat Khan.
The drama will chronicle the final two years of the princess's life, focusing on her relationship with Khan and her success as an international campaigner and humanitarian.
Watts has admitted that she found the prospect of taking on the role hugely intimidating, and "dreaded the public's reaction" to her performance.
Douglas Hodge and Juliet Stevenson are among the supporting cast, while the script was penned by Stephen Jeffreys (The Libertine).
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Diana will be released in late 2013.
Watch a trailer for Watts' next film The Impossible below: