A customized LS600h Landaulet with a transparent polycarbonate roof has been specially constructed for the occasion to allow guests to get a look at the couple during the event, scheduled for July 2.
It was dismantled to allow for the fitting of the 26kg roof, a special addition to the model, which will eventually go on display at the Oceanographic Museum in Monaco.
As the vehicle is a hybrid, Lexus says that much of the tour of Monaco that the couple plan to take after the wedding will be emission-free.
The official wedding car could prove quite a publicity coup for Lexus, which already holds a royal warrant as the official supplier to the Sovereign Prince of Monaco.
Volvo, which was the official supplier of vehicles for the wedding of Crown Princess Victoria and Daniel Westling of Sweden 12 months ago, provided a fleet of specially-designed S80 and V70 vehicles which were seen in pictures around the world.
The vehicles were then sold afterwards and proved exceptionally popular among dealers and buyers, according to Volvo.