Naomi Watts has revealed her mother has given her performance of Princess Diana's "posh" accent her seal of approval.
The Oscar-nominated actress - who has a slight Australian twang from growing up in Sydney - previously revealed her British mother was concerned she would struggle to perfect her accent to play Diana, Princess of Wales in new film Diana.
Naomi revealed: "My mother's seen it and her partner, who is quite posh himself, were impressed with the accent after all.
"She knew how tough that accent is to get.
"And what made it tough was that it wasn't just pure stiff-upper-lip, she had a very breathy, modern sound to her voice, so it didn't sound as posh as it can sound."
Diana's life was cut short when she was killed in a car crash in Paris in 1997.
Naomi previously said she had considered fleeing the country when the film was released as she feared a backlash for taking on the role of the nation's Queen of Hearts.
The 44-year-old actress admitted: "It was said as a joke, but anything you say ends up to be interesting when it's about her, because I think we're so endlessly fascinated with her. Which is a testament to who she was, and what she achieved, and we're still struggling with why she's not here.
"It's the same reason of taking on the role, it was scary at the time. And then once we were filming I was fully committed, obviously, but now we're back to opening it up again and there's always that fear of how it will be received, but I'm generally like that with every film."
The film has received a series of damning reviews.