Naomi Watts has admitted she was dreading the reaction people would have when they heard she was playing the late Diana, Princess of Wales.
The King Kong actress has taken on the title role in the film Diana and spoke to OK! about the nerves that came with it.
She said: "I was dreading the reaction among the public to my playing her. You know that people will complain that you don't look enough like her, that you're not tall enough, all those things.
"It's very difficult to play someone who had such a deep impact and left such a lasting memory on the public. Our memory of her is still very fresh and you have to be respectful of that. It's also more complicated and sensitive when you take into account her two boys. But I want to do her justice and help her story truthfully."
Naomi, 44, talked about her memories of where she was when she heard that Diana had been killed in a car crash in Paris.
She said: "I was shooting a movie in Canada when she died. I happened to be in a room full of people watching the news and we were all crying and deeply upset. It's one of those events you never forget."
Diana is released in cinemas on September 20.