| Last updated
Posting two images on Instagram, Emma wrote: "Tick tock tick tock 15.11.20."
The first snap sees Emma in the beautiful replica gown, while the second shows the actress filming alongside Prince Charles actor Josh O'Connor.
Over on The Crown's Twitter page, creators also shared the image, writing: "A first glimpse of Princess Diana's wedding dress.
"Emmy award-winning costume designer Amy Roberts wanted to capture the same spirit and style of David & Elizabeth Emanuel's original design, without creating a replica for Emma Corrin."
And it's certainly impressive, with the breathtaking gown looking almost identical to the real life version, which featured an incredible 25-foot train.
Fans were blown away with the resemblance, with one person commenting on the photograph: "Wow she really looks like Diana."
While another said: "She really looks like Diana. I had to do a double take."
The fourth season picks up in the late 1970s and will depict much of Prince Charles and Princess Diana's romance, including their wedding.
As Netflix explain: "Charles' romance with a young Lady Diana Spencer (Emma Corrin) provides a much-needed fairytale to unite the British people, behind closed doors, the Royal family is becoming increasingly divided."
You can watch the trailer for the upcoming season below:
Speaking about playing Princess Diana, Emma previously told Vogue she felt like she had got to know the princess over the many months of portraying her in the drama.
"I feel I've got to know Diana like you would a friend. I know that sounds really weird, but I get a great sense of companionship from her," she said.
She also recalled the moment she first stepped out wearing the dress, explaining everyone fell "completely silent"
"We were filming the scene when you first see her in the wedding dress - I think it was Lancaster House in London - and I had a team of about 10 people helping me put it on, because it's massive. I walked out and everyone went completely silent. More than anything else I wear in the series, it's so... It's her," she added.
Fans will also be introduced to Gillian Anderson's portrayal of Margaret Thatcher in the upcoming season and viewers will watch as tensions arise between her and the Queen, which as Netflix explains "only grows worse as Thatcher leads the country into the Falklands War, generating conflict within the Commonwealth."
We're so excited to binge this in one sitting!
Chosen for YouChosen for You
Most Read StoriesMost Read