Princess Eugenie will invite 1 200 members of the public to her wedding to Jack Brooksbank in October.
The 28-year-old royal - who is the daughter of Queen Elizabeth's son Prince Andrew and his ex-wife Sarah Ferguson - will marry Jack at St. George's Chapel in Windsor Castle on October 12 and the couple are launching a public ballot, which will see successful applicants invited into the grounds to be a part of the celebration.
A Buckingham Palace statement announced: "The couple are delighted to announce an opportunity for 1,200 people from across the United Kingdom to be invited into the grounds of Windsor Castle to share the experience of their special day.
"The attendees will view the arrival of the congregation and Members of the Royal Family, listen to a live broadcast of the Marriage Service and watch as the Bride and Groom depart St George's Chapel at the end of the ceremony."
Invitees to the castle grounds will also include members of the local community, children from the schools attended by the princess, royal household staff and representatives of charities supported by Eugenie and Jack.