Overview
- Late September 2026 reports say Prince Harry is exploring a documentary to mark the 30th anniversary of Princess Diana’s death and has approached her brother, Earl Spencer, about taking part.
- Multiple outlets say Prince William has declined offers to appear in or produce anniversary films so he will not be pitted against his brother and prefers to mark the anniversary privately.
- Earl Spencer’s new memoir, Swan Song: Diana, My Sister, prompted an unusually pointed Buckingham Palace response that warned fraternal grief can colour memory and led to at least one factual correction and legal threats tied to disputed passages.
- No documentary has been formally announced and neither Harry nor his representatives have confirmed a project; speculation links any film to Archewell Productions and Netflix because of existing deals but platform and distribution remain unverified.
- If Harry proceeds, sources and royal commentators say the film could deepen the brothers’ rift, shape public reaction to the Spencer book and trigger legal and distribution challenges, with inquiries also under way into leaked advance copies in the Netherlands.