The royal wedding: How it unfolded

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.

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.

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: