By Meg Wagner and Lauren Said-Moorhouse, CNN
Meghan Markle just got to the chapel. She's wearing a dress by British designer Clare Waight Keller.
According to Kensington Palace, Meghan wanted to have a veil that represented "all 53 countries of the Commonwealth" for "her journey through the ceremony."
The bridesmaids and page boys -- all children -- just arrived at the chapel. They were accompanied by their mothers.
Princess Charlotte and Prince George, Prince Harry's niece and nephew, were among them, with their mother, Catherine.
Queen Elizabeth just pulled up to the chapel for the royal wedding with Prince Philip, Duke of Edinburgh.
The British monarch is wearing a delicately flared dress in lime, lemon, purple and gray printed silk, designed by Stuart Parvin. She has completed the outfit with an Angela Kelly hat, using the same lime silk tweed with sinamay and adorned across the crown with handmade lace crystals and pearls made by Lucy Price.
Her brooch is The Richmond Diamond Brooch with pearl drop.
The Duke of Edinburgh is wearing a morning suit.
Prince Harry's father, Prince Charles, is arriving at the chapel alongside his wife, Camilla, Duchess of Cornwall.
Doria Ragland, the bride's mother, has arrived at the chapel. She entered via the Galilee Porch.
She rode with Meghan to the chapel, but got out after the car drove past the crowd at the long walk.
From CNN's Max Foster
Meghan Markle will make a striking feminist statement in her wedding today: She has chosen not to be chaperoned for much of the procession down the aisle of St. George’s Chapel, Windsor, CNN has learned.
Markle will walk unescorted down the aisle of the chapel nave, after being met at the West Door by a member of the clergy. She will be accompanied in this first part of the wedding procession only by her bridesmaids and page boys, with the senior church figure walking ahead.
Prince Charles will join her when she reaches the Quire, the section of the Chapel where the main royal guests will be seated. The Prince — Harry’s father — will walk Markle down the Quire aisle to the foot of the altar.
But Charles will not give her away to her husband-to-be in the traditional sense. instead, he will stand back as Markle approaches Prince Harry.
This is an unprecedented step for a royal bride in the UK. CNN understands that Markle came up with the plan herself. No other royal bride in the UK has walked unescorted down the aisle at their wedding ceremony. Markle’s decision indicates that she wishes to assert herself as a strong, independent woman who is prepared to challenge royal norms.
Meghan Markle's car has arrived at the long walk of Windsor Castle. The walk is lined with cheering crowds.
After driving up the walk, her mom will get out of the car, and her bridesmaids — who are all young children — will get in.
Sarah Ferguson, Harry's aunt who is divorced from Prince Andrew, is at today's wedding. She's wearing a dress with pink trim.
Ferguson wasn't invited to Prince William's 2011 wedding. Her absence from the guest list was especially odd because her children, Princesses Beatrice and Eugenie, were invited.
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.