Australian actress Naomi Watts, is playing the late Princess Diana in her upcoming movie, Diana, which until Friday was going by the working title of Caught in Flight. Wearing sapphires and diamonds and sporting Diana's signature short 'do, Watts, 43, was photographed on set in London, according to E! Online.

Diana, directed by Oliver Hirschbiegel, delves into the relationship between Prince William and Prince Harry's mother and heart surgeon Dr. Hasnet Kahn. It was renamed Diana after going by the name Caught in Flight, according to The Hollywood Reporter.

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