UNDATED (CBS) -- A new trailer offered up more clues on the direction and purpose of "Diana," the controversial bio film about the late princess. The film starring actress Naomi Watts details the final years of Princess Diana's life.
The trailer emphasizes Diana's growing relationship with Pakistani heart surgeon Hasnat Khan. The film itself focuses on the Princess of Wales' final two years of her life, her involvement in humanitarian causes, her relationship with Prince Charles and her alleged affair with the Pakistani doctor.
"Diana" is due out in the U.K. on September 20, with a U.S. release set for October 10.