The first teaser for Diana has hit the web, and Naomi Watts tackles the role of a lifetime to portray the late and beloved Princess Diana.

Rather than her tumultuous marriage to Prince Charles, the film focuses on the last two years of Diana's life, including her campaign against land mines and her relationship with heart surgeon Dr. Hasnat Khan.

Diana is set to hit theaters in the U.K. on September 20, but a U.S. release date has yet to be determined.