Although the nuptials of Prince William to Kate Middleton have been branded a 'people's wedding', well-known faces from the families of Europe's royals will also be on the guest list.
Following the official protocol of a save-the-date fax in January, the list of blue-bloods confirming their attendance is ever-increasing.
Crown Princess Maxima and Prince Willem of the Netherlands will be mingling with King Harald and Queen Sonja of Norway.
And Prince Albert of Monaco and Charlene Wittstock (pictured) are the latest royal faces to confirm their appearance at a packed Westminster Abbey.
Photo: © Rex