20 September 2026 Factual 29 mins
In this UK exclusive, Laura Kuenssberg interviews Earl Spencer after explosive new revelations in his latest book about his sister, Diana, Princess of Wales, her marriage to the now King, her tragic death and the lasting impact on her children, Princes William and Harry.
Watch the official Princess Diana: My Sister’s Story 2026 trailer in HD below.
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United Kingdom 20 September 2026
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