The last performance The People’s Princess was directed by Chilean director Pablo Larrain and takes place at the Sandringham Estate over a Christmas weekend in the early 90s.
He will examine what might have happened in those days as her marriage to Prince Charles stalled, but she still had to be involved with the family.
A haunting version of Lou Reed’s Perfect Day stars in the trailer as outfits are showcased and food is prepared before Christmas dinner.
Diana de Stewart is seen locked in the bathroom in a panic, while someone says, “Ma’am, they are waiting for you.” “
The trailer then shows the Princess walking through the halls of Sandringham before posing for a royal photo.
We also see her invaded by photographers, dancing in the palace and walking alone in the gardens.
After that, a character played by Sally Hawkins tells Diana that “they know everything” while they visit the beach.
“They don’t,” says Stewart, with an impressive English accent.
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Timothy Spall, Jack Farthing and Sean Harris are also part of the A-list cast.
The film takes place 24 years after Diana died in a car accident in Paris at the age of 36.
It will hit UK cinemas later this year after its premiere at the Venice Film Festival on September 3.