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Earl Spencer to publish memoir about Princess Diana in September

Earl Spencer will release "Swan Song: Diana, My Sister" in September to provide a first-hand account of the late princess's life.

Published August 18, 2026 at 9:45 AM EDT

The short answer

Earl Spencer will release "Swan Song: Diana, My Sister" in September to provide a first-hand account of the late princess's life. Earl Spencer, the brother of the late Diana, Princess of Wales, announced on Tuesday that he will publish a memoir about his sister's life.

Earl Spencer to publish memoir about Princess Diana in September

The Facts

Who
Earl Spencer, Penguin Random House UK publishing director Daniel Bunyard, and the late Diana, Princess of Wales.
What
Earl Spencer announced the upcoming publication of a memoir about his sister, Princess Diana, titled "Swan Song: Diana, My Sister."
When
Tuesday, August 18, 2026 (announcement); September 22, 2026 (scheduled release)
Where
United Kingdom
Why
Earl Spencer stated he wrote the book to provide an accurate account of his sister's life from a family perspective and to address what he described as untruths in other accounts as the 30th anniversary of her death approaches.

Timeline of what happened

Key dates and decisions, in the order they occurred.

  1. August 31, 1997

    Princess Diana dies following car crash in Paris

  2. September 6, 1997

    Earl Spencer delivers eulogy at Westminster Abbey

  3. August 18, 2026

    Earl Spencer announces new book project

  4. September 22, 2026

    Scheduled UK release of "Swan Song: Diana, My Sister"

Earl Spencer, the brother of the late Diana, Princess of Wales, announced on Tuesday that he will publish a memoir about his sister's life. The book, titled "Swan Song: Diana, My Sister," is scheduled for release in the United Kingdom next month through Penguin Michael Joseph, a division of Penguin Random House.

The announcement comes nearly 30 years after the Princess of Wales died at age 36 following a car crash in Paris in 1997. Earl Spencer stated that his decision to write the book was prompted by a high volume of interview requests as the 30th anniversary of her death approaches. He previously spoke publicly about his sister's life and the media's treatment of her during her funeral service at Westminster Abbey in September 1997.

In a statement, Earl Spencer said the book aims to provide his perspective on his sister's character to counter "untruths that have become accepted over time." He described the work as an attempt to speak on her behalf in a positive way. Daniel Bunyard, a publishing director at Penguin Random House UK, stated that the book contains "many revelations" and serves as a tribute to the late princess.

Readers will notice a change in the availability of firsthand information regarding the Princess's private life and her brother's views on her legacy. The book's release on September 22 will likely trigger a new cycle of media coverage and public discussion regarding the events leading up to 1997. The Earl noted that he wrote the book specifically so those too young to remember his sister could understand her "dynamic character" and the "self-doubt" she experienced during her life.

The publication may influence future policies or attitudes regarding media conduct and the privacy of royal family members, issues Earl Spencer notably criticized during his 1997 eulogy. By documenting his memories "once and for all," the author seeks to set a precedent for how the family's history is told. The next steps for this development include the official UK release on September 22, followed by the anticipated public and media response to the "revelations" mentioned by the publisher.

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Questions readers ask

What happened: Earl Spencer to publish memoir about Princess Diana in September?

Earl Spencer, the brother of the late Diana, Princess of Wales, announced on Tuesday that he will publish a memoir about his sister's life. The book, titled "Swan Song: Diana, My Sister," is scheduled for release in the United Kingdom next month through Penguin Michael Joseph, a division of Penguin Random House.

Who is involved?

Earl Spencer, Penguin Random House UK publishing director Daniel Bunyard, and the late Diana, Princess of Wales.

When did this happen?

Tuesday, August 18, 2026 (announcement); September 22, 2026 (scheduled release)

Where did this happen?

United Kingdom

Why does this matter?

Earl Spencer stated he wrote the book to provide an accurate account of his sister's life from a family perspective and to address what he described as untruths in other accounts as the 30th anniversary of her death approaches.