Nerves kicking in?
The groom and his best man enter St. George's Chapel.
Loving the beard!
More about Harry and William's wedding attire:
Prince Harry and best man, Prince William have arrived!
Some of Meghan's Suits co-stars make an entrance ahead of her arrival at St George's Chapel.
The guests have arrived in their finery for the wedding ceremony of Prince Harry and Meghan Markle.
Meghan Markle and her mom, Doria Ragland are on their way to St George's Chapel.
What a stylish entrance!
Sarah, the Duchess of York has arrived.
Elton John greets fellow celebs at St George's Chapel.
Priyanka Chopra has arrived!
Tom Hardy and his wife Charlotte Riley are in the building.
Meghan Markle shows off her engagement ring. . Credit: Getty Images Want to know more about the happy couple's wedding rings? Get the details here! Prince Harry, soon to be the Duke of Sussex, will wear a wedding band unlike most royal grooms like his brother Prince William reports The Telegraph.
A massive security operation is under way for the royal wedding in Windsor. It is one of the largest public events policed by Thames Valley.
Serena Williams and her husband Alexis Ohanian are looking amazing!
Eliza Spencer, Louis Spencer, Victoria Aitken and Kitty Spencer arrive at St George's Chapel.
The Beckhams are in the house!
George and Amal Clooney making an entrance.
Duchess Catherine's siblings Pippa and James Middleton have arrived.
Prince Harry's bestie Tom Inskip and his fiancée Lara Hughs arrive at St George's Chapel at Windsor Castle.
Prince Harry's ex-girlfriend Chelsy Davy looks unimpressed.
Royal wedding celebrations take over London's Heathrow airport.
James Blunt and his girlfriend Sofia Wellesley have arrived.
The Band of The Irish Guards keeping the crowd entertained.
Tennis pro, Serena Williams getting ready for the big day.
The late Princess Diana's brother Charles Spencer, 9th Earl Spencer and his wife Karen Spencer have arrived.
Oprah spotted looking for her seat at the #RoyalWedding
Watch a video of guests arriving here:
Oprah and Idris Elba have arrived!
The first guests have arrived. Pictured is Harry's friend and fellow polo player Nacho Figueras and his wife, Delfina Blaquier.
If you're watching on Twitter, you can stream the #RoyalWedding live here:
Stream the #RoyalWedding live on Facebook here:
Actress and close friend of Meghan's, Priyanka Chopra shared a snap of her pre-wedding shenanigans.
British Prime Minister Theresa May has sent well wishes to the couple via Twitter.
My very best wishes to Prince Harry and Meghan Markle on their wedding day. To all of those joining the national celebration with street parties and other events, have a wonderful day. #RoyalWedding— Theresa May (@theresa_may) May 19, 2018
All the #RoyalWedding live feeds:
Kensington Palace announced, ahead of the royal wedding, that Queen Elizabeth will confer a Dukedom on Prince Harry making him the Duke of Sussex. Meghan Markle on marriage will thus be known as the Duchess of Sussex.
We are ready and waiting to spot royal family arrivals in Windsor.
Here's a glimpse of the beautiful flower arrangements at St George's Chapel.
Here's a breakdown of what you can expect to happen today.
Don't miss a thing with this full order of service of the royal wedding ceremony:
The Official Order of Service for the Wedding of Prince Harry and Ms. Meghan Markle is now available to download.https://t.co/dRHckWM0j8— Kensington Palace (@KensingtonRoyal) May 18, 2018
The wedding we have all been waiting for is finally here.
Join us as we bring you minute-by-minute coverage of this momentous occasion.