The Wedding Schedule
On the morning of the wedding, Meghan Markle's mum Doria Ragland will travel with her by car to Windsor Castle.
Guests will be arriving between 09:30am and 11:00am, and members of The Royal Family will begin to arrive from 11:20am. They will enter St George's Chapel via the Galilee Porch, by foot or car.
Lady Jane Fellowes will give the reading, and all three siblings of Diana, Princess of Wales, will be in attendance.
The Dean of Windsor will conduct the service and The Archbishop of Canterbury will officiate as the couple make their vows.
The service is expected to take around an hour.
After the service, the couple will then acknowledge the 200 representatives of Prince Harry's charities gathered in the Cloister.
Seven years ago, Harry's brother Prince William and bride Kate Middleton wed at 11am, at London's grand Westminster Abbey.
Some 26.3 million Brits tuned into watch Kate and Wills tie the knot - after the Queen made April 29 a Bank Holiday that year.
What route will the Windsor procession follow?
Immediately after getting hitched, Meghan and Prince Harry will leave Windsor Castle in a carriage at 1pm.
They will be driven along Castle Hill, Windsor High Street and into the town centre - along Sheet Street, Kings Road and Albert Road.
The newlyweds will then return to Windsor Castle, driving along the beautiful tree-lined Long Walk, for their wedding reception.
Wills and Kate's procession took them through Central London - down Downing Street, Horse Guards Parade and The Mall.
They set off at 12.15pm and were at Buckingham Palace, for their infamous balcony kiss, by 1.25pm - so we'd expect Harry and Meghan to return to Windsor Castle around 2pm.
The FA Cup Final, between Chelsea and Man United, doesn't kick off at Wembley until 5.15pm - so football loving royalists can watch both.
What time is Meghan Markle and Prince Harry's wedding reception?
Once the wedding has finished, all Meghan and Harry's guests are invited to an afternoon reception - hosted by the Queen - at St George's Hall.
We expect this to start at around 2pm.
The wedding procession will both start and end at Windsor Castle
Kate and Wills stayed at their reception for two hours, with the prince driving his new bride back down the Mall to Clarence House at 3.35pm.
An evening reception will take place at Frogmore House, with the final snapshot the public can expect to see being the Bride and Groom departing Windsor Castle for this event.
The formal photographs, which will be taken by Alexi Lubomirski, will be released in the week following the wedding.