The palace confirmation came after weeks of reports noting Charles’ office had been in touch with Harry about the May 6 event at Westminster Abbey.
Harry’s attendance comes despite the rift within the House of Windsor prompted by Harry’s decision to reveal family secrets in his bestselling book, Spare.
The revelations, including details of private conversations with his father — and his brother, Prince William — fanned tensions between Harry and his family that became public when he and his wife moved to North America in 2020.
The book also included allegations members of the royal family regularly feed the press unflattering information about other members of the House of Windsor in exchange for positive coverage of themselves.