Naomi Watts: Gertrude Bell in 'Queen of the Desert'!

Naomi Watts films a scene with Naveen Andrews on the set of Diana on Wednesday (August 15) in London, England.

The day before, the 43-year-old Aussie actress was spotted as a brunette for the filming of the movie.

PHOTOS: Check out the latest pics of Naomi Watts

Naomi is set to star opposite of Robert Pattinson in Queen of the Desert, according to THR.

She will be playing Gertrude Bell, “described as the female Lawrence of Arabia for the impact the English woman had in the Middle East and her work in establishing what would become the modern framework for Jordan and Iraq.” Shooting of the film is slated for this fall.

25+ pictures of Naomi Watts filming Diana with Naveen Andrews…