Final preparations started just before dawn in London on Tuesday as the Household Cavalry rode on horseback through the British capital.
They left their barracks just before 5am local time to meet at Westminster Abbey to participate in a dress rehearsal for the Royal wedding procession.
Police sealed off the streets so military personnel from the army, the Royal Air Force and the navy could complete the walk-through ahead of the real thing in two days time.
The Household Cavalry is one of the oldest and most senior regiments in the British Army, dating back to 1660.
They have troops involved in front-line operations but its mounted regiment acts as the Queen’s personal bodyguard and performs a number of state ceremonial duties.
Hundreds of thousands of people, both from Britain and abroad, are expected to descend on London this Friday to take part in the festivities.