New Trailer: Naomi Chronicles 'Diana' Love Affair

Naomi Watts already impressed audiences in Diana's first teaser trailer -- in which she bears a striking resemblance to The People's Princess -- but now the Oscar-nominated Aussie actress gets to show off her acting chops in the film's first full trailer, which shows her totally embodying the late Princess Diana.

While the new trailer touches on the Princess of Wales' passion for charity work and down-to-earth personality, the heart of it focuses on the intense love affair between Diana and heart surgeon Dr. Hasnat Khan, which was of course doomed by the intense public scrutiny and paparazzi hounding they underwent.

Video: Naomi Watts Talks Princess Diana Film

The obviously passionate relationship ended just before Diana's death in 1997, which makes the trailer above even more heartbreaking.

Video: Watch Naomi Watts Dazzle as Diana

Diana is scheduled to open Sept. 20 in the U.K., while the official U.S. release date has yet to be announced.