Clarence House has released the following timings ahead of the big day.
0815-0945: The general congregation arrive at the Great North Door of Westminster Abbey.
0950: Governors-general and prime ministers of realm countries, the Diplomatic Corps, and other distinguished guests arrive at the Abbey.
1010: Prince William and best man Prince Harry leave Clarence House for Westminster Abbey. They arrive at the Abbey's Great West Door at 1015.
1020: Members of foreign royal families arrive at the Abbey from Buckingham Palace.
1020: Kate Middleton's mother Carole and brother James leave the Goring Hotel for the Abbey. They arrive at the Abbey at 1027.
1025: Members of the Royal Family (except those listed below) leave Buckingham Palace for the Abbey, arriving at 1030.
1035: The following members of the Royal Family leave Buckingham Palace for the Abbey, arriving at 1040: The Duke of York, Princess Beatrice, Princess Eugenie, the Earl and Countess of Wessex, The Princess Royal and Vice-Admiral Timothy Laurence.
1038: The Prince of Wales and Duchess of Cornwall leave Clarence House, arriving at the Abbey at 1042.
1040: The Queen and the Duke of Edinburgh leave Buckingham Palace, arriving at the Abbey at 1045.
1048: The bridesmaids and pages leave the Goring Hotel, arriving at the Abbey at 1055.
1051: The bride and her father Michael Middleton leave the Goring Hotel for Westminster Abbey.
1100: The marriage service begins and is relayed by speakers along the route.
1215: The carriage procession of the bride and groom with a Captain's Escort of the Household Cavalry, followed by the Queen's procession with a Sovereign's Escort of the Household Cavalry, leaves the Abbey for Buckingham Palace.
1230: The bride's carriage procession arrives at Buckingham Palace.
1240: Members of the Royal Family and members of foreign royal families arrive at Buckingham Palace.
1240: Other guests for the reception arrive at Buckingham Palace.
1325: The Queen and the bride and groom, together with their families, appear on the balcony.
1330: Fly-past by the Royal Air Force and Battle of Britain Memorial Flight.