Scarce official ‘Order of Service’ program for the royal wedding of Princess Diana and Prince Charles at St. Paul's Cathedral on July 29, 1981, 20 pages, 8 x 11.25, listing the various music, hymns, and speeches, as well as transcripts of the vows made by the bride and groom; Diana insisted in advance that the word ‘obey’ not be included, a tradition that continues to this day. During the vows, Diana famously spoke Charles’ two middle names, “Philip” and Arthur,” in the wrong order. Printed by Harrison & Sons of London. In very good to fine condition, with foxing to the outside covers.