Diana actress Elizabeth Debicki, 33, goes shopping with her sister – but why in the world does the Crown star need a Stanley knife?

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She delivered a breakthrough performance as the late Princess Diana in The Crown.

Now Elizabeth Debicki seems ready to apply the same razor-sharp precision to her domestic duties as she does to her career.

The 33-year-old actress was spotted in North London with her younger sister Catherine last weekend, carrying paper bags and a brand new Stanley knife.

Dressed in a green beanie, jeans and a long camel coat against the bitter weather, the Australian star of The Night Manager and Tenet popped into a deli and then visited a hardware store across the street for the DIY tools.

She smiled and chatted with her sister, an interior designer, as they walked through the streets in the winter sun.

Elizabeth Debicki seems ready to apply the same razor-sharp precision to her domestic duties as she does to her career

Elizabeth Debicki seems ready to apply the same razor-sharp precision to her domestic duties as she does to her career

The actress was spotted carrying a Stanley knife while shopping in North London with her younger sister Catherine

The actress was spotted carrying a Stanley knife while shopping in North London with her younger sister Catherine

Actress Debicki plays the late Princess Diana in the Crown (photo)

Actress Debicki plays the late Princess Diana in the Crown (photo)

Debicki with Khalid Abdalia on stage at the premiere of the Netflix series in Los Angeles last month

Debicki with Khalid Abdalia on stage at the premiere of the Netflix series in Los Angeles last month

The pair are often seen together and were both photographed at the Dior show during Paris Fashion Week in January and at the Golden Globes in Beverly Hills, where Debicki was nominated for Best Supporting Actress for her role in The Crown.

Debicki, who was raised as a ballet dancer in Melbourne by her parents, is currently starring in the sixth and final season of the Bafta-winning Netflix show, having taken over the role from Emma Corrin.

She has received critical acclaim for her “compelling” portrayal and uncanny resemblance to the late princess, including her voice and doe-eyed gaze – and for recreating iconic images such as Diana sitting on the edge of a yacht's diving board in a blue swimsuit. However, there has also been criticism of the producers' decision to have the princess appear as a 'ghost' in later scenes of the historical drama.

Debicki's next big screen role will be alongside Ruth Wilson and Bobby Cannavale in the romantic thriller Andorra.