Tomorrow is the big day - Prince William and Kate Middleton will be united in marriage as the entire world looks on.
And today (April 28), William’s brother Prince Harry was spotted arriving at Westminster Abbey with the bride-to-be for some last-minute rehearsals
For fans of the Royals here in the States, here’s a detailed schedule of tomorrow’s events, laid out according to Eastern Standard Time (courtesy of ABC News).
3:00 a.m. - 4:00 a.m. -- The morning of April 29 will start with an announcement from the Queen's office stating the titles that Prince William and Kate Middleton will take.
3:15 a.m. -- General wedding guests will start showing up atWestminster Abbey. These guests will enter the church through the Great North Door.
4:50 a.m. -- VIPs, such as Governors-General and Prime Ministers of Countries under the Commonwealth of England, Diplomatic Corps and distinguished guests, arrive at Westminster Abbey. They will enter the church through the West Door.
5:10 a.m. -- Prince William and best man, Prince Harry, depart Clarence House.
5:15 a.m. -- Prince William and Prince Harry arrive at Westminster Abbey.
5:20 a.m. -- Members of foreign royal families, including Prince Albert of Monaco and Prince Felipe and Princess Letizia of Spain, arrive at the church.
5:20 a.m. -- Kate's mother Carole Middleton and brother James Middleton, depart the Goring Hotel.
5:27 a.m. -- Carole and James Middleton arrive at Westminster Abbey.
5:30 a.m. -- Members of the Royal Family begin arriving at the Abbey.
5:38 a.m. -- Father of the groom, Prince Charles and his wife, Camilla, depart Clarence House.
5:40 a.m. -- Prince Andrew (uncle of the groom) and his daughters Beatrice and Eugenie; Princess Anne (aunt of the groom), and her husband; Prince Edward (uncle of the groom) and his wife, arrive at Westminster Abbey and enter church through the West Door.
5:40 a.m. -- Queen Elizabeth and Prince Philip depart Buckingham Palace.
5:40 a.m. -- Prince William and Prince Harry will move into St. Edmunds Chapel until moments before the royal wedding begins.
5:42 a.m. -- Prince Charles and Camilla arrive at the Abbey.
5:45 a.m. -- Queen Elizabeth and Prince Philip are the last guests to arrive at Westminster Abbey.
5:48 a.m. -- Kate's bridesmaids and William's pageboys depart the Goring Hotel.
5:51 a.m. -- Kate Middleton, accompanied by her father, will depart the Goring Hotel in a 1978 Rolls-Royce from the royal state car collection and make her way to Westminster Abbey.
5:55 a.m. -- Bridesmaids and pages arrive at the church.
5:58 a.m. -- The bride, Kate Middleton, who will be officially be known as Catherine, and her father Michael arrive at Westminster Abbey.
6 a.m. -- The ceremony begins. The service is set to last just over an hour and will include vows and a sermon delivered by the Bishop of London, private clergyman to the queen.
7:15 a.m. -- Prince William and the new Princess Catherine will depart Westminster Abbey, by carriage, and process to Buckingham Palace. The carriage carrying the bride and groom will be followed by 4 other carriages carrying their bridal party, parents and Queen Elizabeth and Prince Philip.
7:30 a.m. -- The Bride and Groom arrive at the Grand Entrance of Buckingham Palace.
7:40 a.m. -- Members of the royal family, foreign royal families, and other reception guests begin arriving at Buckingham Palace.
8:25 a.m. -- The married couple reappear on the balcony at Buckingham Palace with the Queen and their families for 10 minutes.
8:30 a.m. -- The Royal Air Force, where Prince William serves as a search-and-rescue pilot, will perform a flyover.
Enjoy the pictures of Kate Middleton out for another day of rehearsals alongside Prince Harry (April 28).