Watts: Diana accent made me nervous
Naomi Watts has confessed she found mastering Diana, Princess of Wales' "posh" accent nerve-racking.
The Oscar-nominated actress stars in Diana, a film about the last two years of the princess' life before she was killed in 1997 in a Paris car crash.
Naomi, who was born in the UK but moved to Australia in her teens, told Total Film magazine: "I was very nervous about the accent.
"She had a very distinct voice - she came from aristocracy so she was quite posh, but there was a warmth there, too. Her accent wasn't too 'fruity'.
"She also had this thing where the bottom half of her face didn't move that much."
The Impossible star, who has previously admitted she is dreading the public reaction to her performance, recreates Diana's famous Panorama interview in the film, and revealed she listened to it constantly.
She said: "I watched it pretty much every day during make-up; I went running with it playing in my iPod.
"It was probably the thing I was most committed to getting exactly right - the head moves, the eye moves, the hair - because everyone knows it so well. It's such an extraordinary piece of TV."
Diana will open in UK cinemas on September 20.