Spare has set a new record as the fastest-selling non-fiction book published by Penguin Random House.

Prince Harry's tell-all is said to have sold over 400,000 copies in the UK.

Combined with sales in US and Canada, the total copies sold have passed over a million.

"Spare is a book that demands to be read, and it is a book we are proud to publish," said a showrunner at the publishing house.

The book was first announced by the publishers in 2021 and has since generated several discussions online.

The book's snippets leaked before its release detailed several bombshells about the royal family.

Prince Harry also shared in an interview that the book's purpose was not to hurt his family.

"None of anything that I've written, anything I've included, is ever intended to hurt my family," said the Duke of Sussex.

Harry shared that he still loves his brother despite their differences over the years.