Prince Harry and Meghan Markle will marry on Saturday, May 19, in St. George’s Chapel in the grounds of Windsor Castle, about 20 miles (32 kilometers) west of central London.
Windsor is the oldest and largest inhabited castle in the world and an official residence of Queen Elizabeth II, who spends most of her weekends there.
The chapel has a capacity of around 800.
The couple will exchange vows at noon (7 a.m. EDT).
At 1 p.m. (8 a.m. EDT), the newlyweds will leave Windsor Castle in a carriage for a roughly two-mile procession, traveling along the High Street through the town of Windsor, before returning to the castle by the Long Walk, according to the Palace.
The couple and guests will then attend a reception hosted by Queen Elizabeth II at St. George’s Hall in the castle grounds, prior to a smaller evening reception for around 200 friends and family hosted by Prince Charles, Harry’s father.
The Dean of Windsor, the Rt. Rev. David Conner, and the Archbishop of Canterbury, Justin Welby, the leader of the Church of England, will officiate the ceremony.
Markle is now a fully-fledged member of the Church of England after she was reportedly baptized and confirmed by Welby in a secret ceremony in March.
It’s been widely assumed Prince William will step into the role of best man. But in January, the Duke of Cambridge spoke of the upcoming nuptials and joked that his brother had not asked him yet.
More than 250 members of the British Armed Forces will also be involved on the day, an acknowledgment of Harry’s time in the army. Personnel from a number of units including the Royal Marines and the Windsor Castle Guard will line the local streets, with music provided by the Band of the Irish Guards.
More than 2,600 people will receive a personal invitation inside the grounds of Windsor Castle on the big day. The invitees — including 100 local schoolchildren and 610 Windsor Castle community members — will be able to watch the arrivals of the bride and groom and their guests and to watch the newlyweds depart the castle on their carriage procession.
Official invitations to the ceremony and the lunchtime reception have been sent, but the guest list remains a secret.
The invitations were made by Barnard & Westwood, a London printer and bookbinder that has been making invitations for the royal family since the 1980s, according to Kensington Palace.