Just like Diana: Naomi Watts wears Princess's trademark plunging black evening dress as she films Caught In Flight

It was one of Princess Diana's most famous outfits, worn to her birthday celebrations back in 1997.
And Naomi Watts slipped into an exact replica of the low-cut black glittering gown as she filmed the tragic Princess's biopic Caught In Flight today.
The English actress looked the spitting image of the royal as she recorded a dinner party scene on set in Croatia.

Spitting image: Naomi looked very much like Princess Diana when she attended her 1997 birthday celebrations

Challenging part: Naomi Watts looked just like Princess Diana on the film set of biopic Caught in Flight in Croatia today

She simply shone in the floor-length ensemble, which was twinned with a diamond necklace and sapphire earrings, another of the Princess's favourite accessories.
Naomi was locked in conversation at the recreation of a black tie event attended by the then troubled royal.
She appears to be completely flinging herself into the role after initially feeling apprehensive about taking the part.
However it seems the chance to work with German director Oliver Hirschbiegel, who is famous for his portrayal of the last days of Hitler in his bunker in Downfall, was too good to turn down.

Black tie affair: Naomi chatted with a snappily dressed actor as she filmed a scene for the controversial film

Grand surroundings: The scenes were being shot at an appropriately impressive stately home

The acclaimed filmmaker said that Naomi is ‘a truly exceptional actress’ who embodies ‘the warmth, humanity and empathy’ of the ‘global icon’ Princess Diana.

And she was certainly working hard to make sure her performance at the nighttime dinner party scenes was note perfect.
She was seen spending much of the day preparing, and was locked in discussions Oliver about the best way to approach filming the important scenes.
The film is a particularly difficult balancing act, as it follows the last two years of the tragic royal’s life before her death in 1997.

Getting ready: The hard working actress was at the location bright and early so she could plan her performance

Ready to get started: The pretty English actress had a chat with some crew members before she went to work

Bunker mentality: Downfall director Oliver Hirschbiegel made sure he have her a detailed walk-through before filming began

At the weekend she had been spotted looking uncannily like the figure, who was famously labelled the People's Princess by smoothie former Prime Minister Tony Blair, as she stepped out of a car in a long silver gown that showed off her slender figure, just like Diana's.
Her 's hair was coiffured to perfection as she filmed a scene showing her arriving at a red carpet event.
She teamed the dress with black shoes and matching clutch bag with a string of diamonds round her neck, perfectly capturing the Princess's sense of style.
Last week, Naomi was snapped filming scenes in London and bore an uncanny likeness to Diana in a black suit.
The film is thought to focus on her relationship with heart surgeon Dr Hasnat Khan and also looks at her time with Dodi Fayed, who she was with at the time she died. The movie will include her death, aged 36, in a car in a Paris tunnel in 1997 with Dodi.

Nice to see you! Naomi steps out of a chauffeured car as she filmed scenes for Caught In Flight

Buffed to perfection: A make-up artist was on hand to make sure Naomi looked immaculate...

Miss Watts, who at the start of her career starred in Australian daytime soap Home and Away, has admitted she is ‘absolutely terrified’ of playing the part of the princess.
The Oscar-nominated actress has said of her controversial new role: 'She is a part of our history, an incredible woman and fascinating but a tragic ending.
'The film-makers came to me and it’s a good script and it’s very scary and I kind of wanted to say "no" but I couldn’t.'

Miss Watts moved to London’s Kensington to prepare for the role and was said to have visited Diana’s favourite places -such as The Harbour Club and Beauchamp Place - as part of the preparations to get into character.
Her co-star Naveen Andrews, who plays Dr Hasnat Khan in the film recently, suggested Miss Watts is the only actress able to play the princess.
The Lost actor said: ‘I don’t think anyone else could have done it - there’s no one else.’ 

He added: ‘Whenever you work, usually if something has a chance or the potential to be good it usually starts with a good script and I’m very happy with the script and Naomi is doing it and she’s wonderful... I’m very much looking forward to shooting.’

Magic of make-up Miss Watts insisted that she looked nothing like Diana, seen right in Angola in 1997- but the film's make-up artists have certainly done their job