By Meg Wagner and Lauren Said-Moorhouse, CNN
Wearing Household Cavalry uniform, Prince Harry has arrived for his wedding day.
He is accompanied by his brother and best man, Prince William, who is also wearing a cavalry uniform.
Both are wearing the frockcoat uniform of the Blues and Royals -- a cavalry regiment of the British Army. The frockcoats are for those with the rank of Major, and they have large gold embroidered crowns on them.
Fun fact: The Queen had to give her permission for Harry to get married in his uniform.
Late Late Show host James Corden just arrived at the wedding venue with his wife.
As Meghan Markle makes her way to Windsor, members of the royal family have started to arrive at the chapel.
Harry’s cousin Peter Philips and wife Autumn; cousin Zara Tindall and husband Mike and Prince and Princess Michael of Kent kick off the first wave of royal family.
They are followed closely behind by Harry's uncles, Princes Andrew and Edward, and his aunt, Princess Anne.
Meghan Markle has departed Cliveden House Hotel in Taplow -- where she spent her final night as a single woman with her mother, Doria Ragland.
The pair are driving in a Rolls Royce, with the journey expected to take around 25 minutes.
Serena Williams, a close friend of Meghan Markle, is in the chapel.
She's sitting in the Quire, the section that appears to be for family and other close friends. Oprah Winfrey is in that section, too.
Earlier today, Williams tweeted photos of her Versace outfit:
Actors Tom Hardy and Charlotte Riley are arriving for the wedding ceremony of Prince Harry and Meghan Markle.
British royal weddings are usually grand affairs of state, where presidents and prime ministers rub shoulders with obscure European monarchs.
This isn't the case today in Windsor: Prince Harry and Meghan Markle opted not to invite political leaders to the event — unless they are friends of the couple.
One of those invited in a personal capacity is former British Prime Minister John Major, who was guardian to Prince Harry after his mother, Diana, died in 1997.
As expected, several of Meghan's co-stars from "Suits" are in attendance. Her on-screen husband, actor Patrick J. Adams, has arrived to the chapel as well as Gabriel Macht, who plays Harvey Specter.
Several minutes earlier, Abigail Spencer, Sarah Rafferty and Gina Torres arrived.
Indian actress and winner of Miss World 2000, Priyanka Chopra, is arriving at the chapel wearing a gray Vivienne Westwood dress and, like Oprah, a Philip Treacy hat.
