Watts 'walked around with cocktail stick in her mouth' for Diana role

Naomi Watts had to paralyse the right-side of her face to play Princess Diana.

The 44-year-old actress plays the late Princess of Wales in new biopic 'Diana' and she was so determined to perfect her mannerisms that she was forced to wander around with a wooden cylindrical stick in her chops in order to change the way her mouth moved.