Wedding of Princess Margaret and Antony Armstrong-Jones

Margaret made her way with the Duke of Edinburgh from Clarence House in the Glass Coach, arriving at the church at 11:30.[3] The wedding took place at Westminster Abbey and was conducted by The Most Rev. Dr. Geoffery Fisher, Archbishop of Canterbury and The Very Rev. Eric Abbott, Dean of Westminster.[3] It was the first royal wedding to be broadcast on television with an estimated 300 million viewers.[9]

Armstrong-Jones's best man was Dr. Roger Gilliatt, son of the Queen's gynecologist.[3] The Countess of Rosse, the groom's mother, had hoped he would choose his half-brother, Lord Oxmantown, as his best man. However, resentment of their mother's favoritism led him to reject this suggestion. On 19 March, it was announced he had chosen Jeremy Fry for the role, but Fry was convicted of "importuning for immoral purposes" after allegedly approaching a man for sex, so was replaced.[10][11]

Princess Margaret was attended by eight bridesmaids:

• The Princess Anne, daughter of The Queen and The Duke of Edinburgh
• Miss Angela Nevill, daughter of Lord and Lady Rupert Nevill
• Lady Rose Nevill, daughter of The Marquess and Marchioness of Abergavenny
• The Hon. Catherine Vesey, daughter of The Viscount and Viscountess de Vesci
• Miss Sarah Lowther, daughter of Mr. and Mrs. John Lowther
• Lady Virginia Fitzroy, daughter of Earl and Countess of Euston
• Miss Annabel Rhodes, daughter of The Hon. Margaret and Mr. Denys Rhodes
• Miss Marilyn Wills, daughter of The Hon. Jean and Captain John Will

Prior to the service, works by Johann Sebastian Bach, George Frideric Handel, Henry Purcell and William Henry Harris were played on the organ. The bride walked down the aisle to the hymn "Christ is Made the Sure Foundation" to the tune Westminster Abbey by Purcell. Throughout the service, anthems by Franz Schubert, William Byrd and Gustav Holst were sung. The recessional music, at the special request of the bride, was "Trumpet Tune and Airs" by Purcell.[12]

The Princess wore a silk organza gown designed by Norman Hartnell. She accessorized with the Poltimore tiara, which she had purchased at auction a year earlier, and a diamond riviére of 34 old-cut diamonds given to the bride by her grandmother, Queen Mary.[13] She carried a bouquet of white orchids. Hartnell also designed the outfits of the Queen and the Queen Mother.

Armstrong-Jones and all male members of the royal family, except for Lord Mountbatten, wore morning dress.

• The Queen and The Duke of Edinburgh, the bride's sister and brother-in-law
  • The Prince of Wales, the bride's nephew
  • The Princess Anne, the bride's niece (bridesmaid)
• Queen Elizabeth The Queen Mother, the bride's mother
• The Princess Royal, the bride's paternal aunt
  • The Earl and Countess of Harewood, the bride's first cousin and his wife
  • The Hon. Gerald and Mrs. Lascelles, the bride's first cousin and his wife
• The Duke and Duchess of Gloucester, the bride's paternal uncle and aunt
  • Prince William of Gloucester, the bride's first cousin
  • Prince Richard of Gloucester, the bride's first cousin
• The Duchess of Kent, the bride's paternal aunt by marriage
  • The Duke of Kent, the bride's first cousin
  • Princess Alexandra of Kent, the bride's first cousin
  • Prince Michael of Kent, the bride's first cousin
• Lady Patricia and The Hon. Sir Alexander Ramsay, the bride's first cousin, twice removed, and her husband
  • Alexander Ramsay of Mar and The Mistress of Saltoun, the bride's second cousin, once removed, and his wife
• Princess Alice, Countess of Athlone, the bride's first cousin, twice removed and paternal great-aunt by marriage
• The Earl Mountbatten of Burma, the bride's second cousin, once removed
  • The Lady Brabourne, the bride's third cousin

• The Queen of Denmark, the bride's second cousin, once removed, and godmother

• The Hon. Jean and Captain John Wills, the bride's first cousin and her husband
  • Miss Marilyn Wills, the bride's first cousin, once removed
• The Hon. Margaret and Mr. Denys Rhodes, the bride's first cousin and her husband
  • Miss Annabel Rhodes, the bride's first cousin, once removed

• Major and Mrs. Ronald Armstrong-Jones, the groom's father and stepmother
  • The Viscountess and Viscount de Vesci, the groom's sister and brother-in-law
    • The Hon. Catherine Vesey, the bridegroom's niece
• The Countess and Earl of Rosse, the groom's mother and stepfather
  • Lord Oxmantown, the groom's half-brother
  • The Hon. Martin Parsons, the groom's half-brother

• The Prime Minister and Lady Dorothy Macmillan
• The Foreign Secretary

• Robert Menzies, Prime Minister of Australia
• John Diefenbaker, Prime Minister of Canada
• Kwame Nkrumah, Prime Minister of Ghana
• Jawaharlal Nehru, Prime Minister of India
• Ayub Khan, President of Pakistan

The wedding coincided with the 10th Commonwealth Prime Ministers' Conference held at Windsor Castle. As a result, many of the Commonwealth dignitaries attended the wedding.[14]

• The Most Rev. Dr. Geoffery Fisher, Archbishop of Canterbury
• The Very Rev. Eric Abbott, Dean of Westminster

• Dr. and Mrs. Roger Gilliatt (best man)
• Earl and Countess of Euston
  • Lady Virginia FitzRoy (bridesmaid)
• Mr. and Mrs. John Lowther
  • Miss Sarah Lowther (bridesmaid)
• The Marquess and Marchioness of Abergavenny
  • Lady Rose Nevill (bridesmaid)
• Lord and Lady Rupert Nevill
  • Miss Angela Nevill (bridesmaid)