Queen Elizabeth arrived at the 'society wedding of the year' between Lord Mounbatten's great grand daughter, Alexandra Knatchbull, and her fiance entrepreneur Thomas Hooper.
Prince Charles gave the elegant bride away, as he accompanied Miss Knatchbull, the daughter of his close friend Norton Knatchbull, who holds the title of Lord Brabourne, into the church.
The bride's father, Norton Knatchbull, was too ill to perform the necessary duties.
The Queen wore a peach floral dress with a matching coat and hat as she entered the service with her husband the Dukeof Edinburgh who was wearing tails and a gold waistcoat.
Forensic accountant Alexandra married her entrepreneur husband after the pair enjoyed a long-term relationship.
Among the wedding guests was Queen Sophia of Spain, the Former monarchs of Greece, King Constantine II and his wife Queen Anne-Marie as well as Prince Hassan bin Talal of Jordan and his wife Princess Sarvath al-Hassan.