The latest photos come a month after Stewart's first look as Di stunned fans
From fancy pants and statement sleeves to colour-blocking and oversized sweaters, Di did it first!
The dress was designed by Emmy award-winning Amy Roberts
The upcoming movie is about the breakdown of her marriage to Prince Charles.
She wore the dress to a state dinner hosted by the late President Ronald Reagan in 1985.
He and his wife Meghan Markle appeared in an ITV documentary.
She was named after William's mother following Diana's visit to Chitral in 1991.
The Duke and Duchess of Cambridge landed in Islamabad on Monday.