It was announced last year that she would take over from Emma Corrin in the hit Netflix program and play Diana for the fifth and sixth series, which will include Diana's death in 1997.
And Elizabeth Debicki was seen on the set of The Crown's fifth season for the first time on Wednesday, when she filmed scenes in Scotland alongside two young actors playing Prince Harry and Prince William when they were just boys.
Shooting at the majestic Ardverikie Estate, Elizabeth, 30, was the spitting image of the late princess and was dressed in light-wash jeans, a smart navy blazer jacket and a salmon pink shirt.
First look: Elizabeth Debicki, 30, was seen as Princess Diana on the Scotland set of The Crown's fifth season for the first time on Wednesday
Running ahead of her down a path that stretched across the sprawling estate's gardens, two young actors playing Harry and William could be seen.
Both dressed in jeans and matching striped rugby shirts, the boys' resemblance to both the Duke of Sussex and Duke of Cambridge was a testament to the series' casting.
Members of the crew stood outside around the three actors while others wearing masks were visible watching through the estate's windows.
It was announced that Elizabeth had been cast as Princess Diana last August, and fans of the Netflix show were delighted to hear that the Australian actress would be taking on the role.
Spitting image: Shooting at the Ardverikie Estate, Elizabeth was the spitting image of the late princess and filmed scenes alongside actors playing a young Prince William and Prince Harry
From her big break in 2013's The Great Gatsby to becoming a household name thanks to 2016 TV series The Night Manager, the star steadily climbed up the ranks of showbusiness to secure the career-making role.
A former ballerina in training, Elizabeth switched to theatre during high school. She studied at University of Melbourne's Victorian College of the Arts, where she was also awarded the Richard Pratt Bursary for outstanding acting students.
She shot to stardom after making her debut in The Great Gatsby in 2013, after impressing the film's director, Baz Luhrmann, with her brief appearance in the 2011 Australian movie A Few Best Men.
Since then, she has appeared in several movies including The Man from U.N.C.L.E., Tenet and The Cloverfield Paradox.
Casting: It was announced that Elizabeth had been cast as Princess Diana last August, and fans of the Netflix show were delight to hear that the Australian actress would be taking on the role
Elizabeth has also done voiceovers for Peter Rabbit and appeared in television series The Kettering Incident and The Night
