Prince Harry and Meghan Markle''s royal wedding in Windsor will be witnessed by millions of people around the world whose eyes will be set on the couple.
Hundreds more have spent a night on the streets of Windsor to secure the best viewing spot.
The couple will wed at noon at St George''s Chapel in Windsor Castle, before travelling through the town in a carriage at 1300 local time / 4.30 pm IST.
In her vows, Ms Markle will not promise to "obey" her husband and Prince Harry has chosen to have awedding ring, BBC news reported.
On the eve of their wedding, Prince Harry told crowds in Windsor he was feeling "relaxed" and Ms Markle said she was feeling "wonderful".
Crowds of well-wishers - many wearing union flags - royal superfans and the world''s media have been gathering in Windsor in the week leading up to the big day.
As many as 100,000 people are expected to line the streets, hoping to get a glimpse of the happy couple.
Six hundred guests will watch the wedding, officiated by the Archbishop of Canterbury, Justin Welby, in St George''s chapel, with the service broadcast to millions across the world.
About 1,200 members of the public - many who are recognised for their charity work - have been invited into the grounds of Windsor Castle for the wedding.
Prince Harry is expected to arrive with his brother and best man Prince William at the west door of the chapel at 1140.
The Queen will be the last member of the Royal Family to arrive at 1152, before Ms Markle arrives with her mother Doria Ragland.
Ms Markle has 10 bridesmaids and pageboys, all under the age of eight - including Prince George and Princess Charlotte.
The bride will be met by Prince Charles, who will walk her down the aisle of the Quire of the chapel.
During the service, the couple will pledge themselves to one another, saying: "For better, for worse, for richer, for poorer, in sickness and in health, to love and to cherish, till death us do part."
The Most Rev Bishop Michael Curry, the 27th presiding bishop and primate of the Episcopal Church, from Chicago, will give an address at the wedding and the Rt Rev David Conner, Dean of Windsor, will conduct the service.
Lady Jane Fellowes, the sister of Prince Harry''s late mother, Diana, Princess of Wales, will give a reading.
Karen Gibson and The Kingdom Choir will perform Ben E. King''s soul classic Stand By Me during the service.
The gospel choir will also perform Etta James'' uplifting version of Amen/This Little Light of Mine as the newlyweds leave the chapel.
UNI XC-AE 1255
-- (UNI) -- C-1-1-DL0100-1370021.Xml