There will be five horse-drawn carriages in the Carriage Procession from Westminster Abbey to Buckingham Palace. The first carriage will be the 1902 State Landau or Glass Coach (in case it rains) carrying the Bride and the Bridegroom.
The second and third carriages will be Ascot Landaus carry the Best Man, Maid of Honor and Bridesmaids. The fourth carriage will be a Semi-State Landau carrying The Queen and The Duke of Edinburgh. The fifth carriage will be a Semi-State Landau carrying The Prince of Wales, The Duchess of Cornwall and Mr. and Mrs. Middleton.
And this isn't your regular old carriage. It was specifically built for King Edward VII in 1902 and is usually used by The Queen to meet Foreign Heads of State when they arrive on State Visits to Britain.
Sounds so fancy! Like it's fit for a King or something. Me, I prefer a regular old party bus full of booze.