Millions of people across the country will be tuning in to watch the royal wedding live on TV.
Live coverage of the day’s events at Windsor Castle by the BBC will be presented by Kirsty Young, Huw Edwards and Dermot O’Leary among others.
Julie Etchingham and Phillip Schofield will lead ITV’s coverage.
Sky News is screening the proceedings in ultra high definition with Kay Burley presenting from a special studio on the Long Walk.
Here MailOnline provides an armchair guide to the royal wedding on Saturday…
9am
Members of the public who have been invited to watch the wedding day from the grounds of Windsor Castle begin to arrive.
9.30am
Wedding guests begin arriving at the castle’s famous Round Tower by coach. They will enter St George’s Chapel through the South Door and take their seats.
Guests will be arriving at the Round Tower at Windsor Castle by coach and will be seen walking to the South Door of St George’s Chapel from 9.30am. The tower was closed to visitors in 1975 for major construction work and was under-pinned to prevent subsidence, but instead of reopening to visitors, it was later converted into office space for the Royal Archives in 2011
The Quire in St George’s Chapel at Windsor Castle, Berkshire, where the royal wedding will be held on May 19. The magnificent Quire was the first part of St George’s Chapel to be completed and its aisles were finished and roofed between 1477 and 1483
Kensington Palace is not releasing a full official guest list. Some 600 guests will be in St George’s and 200 of those will party into the night at the reception in nearby Frogmore House following the ceremony in the Quire, pictured
11.20am
Members of the Royal Family begin arriving, entering via the Galilee Porch, some on foot and others by car.
11.45am
Harry and his brother the Duke of Cambridge are expected to appear at the Chapel’s West Steps, probably on foot, walking past the thousands of spectators invited into the grounds of the castle.
This will give Harry an opportunity to acknowledge the 200 representatives from charities he is associated with gathered in the Horseshoe Cloister at the bottom of the steps.
11.55am
Following protocol, the Queen will be the last member of the Royal Family to arrive.
Following protocol, the Queen will be the last member of the Royal Family to arrive at around 11.55am. The service will start at noon and everyone will already know most of what to expect as the order of service is being released at midnight on Friday. Her Majesty is pictured left at garden party on Tuesday and right attending the first day of the Royal Windsor Horse Show
At 1pm, the congregation will file out of the chapel to see the newlyweds leave before heading to St George’s Hall for the lunchtime reception hosted by the Queen. Her Majesty is pictured with the Earl of Wessex and the Duke of York at a garden party on Tuesday at Buckingham Palace
11.59am
With a minute to go, Meghan Markle is expected to turn up at the Chapel’s West Steps by car, from her overnight accommodation, with some of her bridesmaids and pageboys.
She will start her journey, which will take her past some of the crowds in the Long Walk, with her mother Doria Ragland – but when the car stops at the castle her mother will exchange places with her bridesmaids and pageboys, including Princess Charlotte and Prince George. Ms Ragland will enter the chapel by the Galilee Porch.
Meghan Markle’s journey through Windsor will take her past some of the crowds in the Long Walk as she is accompanied by her mother Doria before she exchanges places with Meghan’s bridesmaids and pageboys, including Princess Charlotte and Prince George
Noon
The service starts. Everyone will already know most of what to expect as the order of service is being released at midnight on Friday.
1pm
The newlyweds will emerge about an hour later at the West Steps of the Chapel. They will be waved off on their carriage procession through Windsor by members of both families.
The congregation will file out of the chapel to see the newlyweds leave before heading to St George’s Hall for the lunchtime reception hosted by the Queen.
The carriage procession through the streets of Windsor is expected to take about 25 minutes.
The congregation will file out of the chapel to see the newlyweds leave before heading to St George’s Hall for the lunchtime reception hosted by the Queen
7pm
The reception is not being televised and neither is the evening reception at Frogmore House, but viewers will get another glimpse of the royal couple when they leave Windsor Castle at 7pm for the evening do, which is hosted by the Prince of Wales.