Two of Harry's former partners are attending the service.

Cressida Bonas (seen here in a very colourful dress) dated Harry between 2012 and 2014 while Chelsy Davy and the prince had an on-off relationship between 2004 and 2010.

They're among the 600 guests invited to St George's Chapel.

Image source, PA

Image source, Getty Images

Not everyone is excited for today.

Some people have taken to Twitter to show their ambivalence towards the royal wedding, including Daily Mirror associate editor Kevin Maguire who shared the above snap of a "royal wedding sick bag".

Other tweeters include Leeds University lecturer John Gallagher who said, external he was happy to provide commentary to any media organisations interested - so long as they were okay with him answering every question with "you people are a disgrace".

Meanwhile, one person seemed to be very excited for the wedding, external - of Jake Peralta and Amy Santiago on Fox's Brooklyn Nine-Nine, that is.

Image source, Aimee Spicer

On one day, the 19th of May,

Something wowza is going to happen,

Ring a ding ding from the Church bell,

Harry and Meghan both looking well,

Now getting married on this fine day,

Let's just hope the weather stays that way,

People come from far and wide,

To see Prince Harry and his beautiful bride,

The streets are lined 10 people deep,

Waving their flags and smiling sweet,

Prince Harry and Meghan I'd love to meet,

But I haven't booked me and Grandpop a seat!

Are you celebrating the royal wedding in your own unique way?

Email: haveyoursay@bbc.co.uk or tweet @BBC_HaveYourSay with your pictures?

BBC Radio 5 live

Ellie and Cathy are big Prince Harry fans - they're still hoping Harry will change his mind when he sees them.

Ellie said: "There's time - we're both hoping that the brakes will squeal when he goes past!"

Cathy added: "There is a bit of jealousy because we're been in Windsor our whole lives and he's chosen a girl from America!"

Click here to listen to the 5 live coverage.

The Duchess of Cambridge's family have arrived. Some viewers thought Pippa Middleton stole the show at the last royal wedding - but her arrival in Windsor today was more low-key.

Image source, PA

Image source, Getty Images

It's the crown they all wanted.

Prince Harry's wedding has seen him rise above his brother and the late singer Prince in Google's 'prince' search rankings.

Some A-list guests have just arrived.

Human rights lawyer Amal Clooney is wearing a mustard yellow dress and matching hat, accompanied by her husband, actor George Clooney, in a pale grey suit.

Moments later, we saw David and Victoria Beckham arrive. The fashion designer is wearing a dark blue dress with a veiled hat.

We've also seen Hollywood actress Carey Mulligan with her musician husband Marcus Mumford.

The BBC's royal correspondent is confused...

St George's Chapel is filling up quickly now with all 600 guests expected to be seated by 11:15.

The service is due to begin at midday.

Image source, Charmaine Gooden

Charmaine Gooden, wrapped in the flag of Canada, has flown in from Ottawa for the wedding.

She says she has adored the Royal Family since she was growing up in Jamaica.

In 2011, she traveled to the UK for the wedding of the Duke and Duchess of Cambridge.

Are you in Windsor for the Royal Wedding? Email: haveyoursay@bbc.co.uk or tweet @BBC_HaveYourSay, external with your pictures.

Image source, Getty Images

Guests are filing in through the South Door to the chapel. They include broadcaster Dan Snow, Wasps player James Haskell - with his fiancé Chloe Madeley - and singer James Blunt, above.

The guests "give a real sense of the couple who are at the centre of proceedings today" said Kirsty Young, who's co-hosting BBC One's coverage of the big day.

News now on the wedding rings.

Kensington Palace says Meghan's wedding band will be made of Welsh gold, which was gifted by the Queen. It's a royal tradition dating back more than 90 years for Welsh gold to be used.

Prince Harry will wear a platinum band. News that he would opt to wear a wedding ring - considered a modern tradition - was announced earlier.

The BBC's Fiona Bruce is busy working today but she took time out on Friday to provide a glimpse behind the scenes and show viewers where the media are based in Windsor.

BBC Radio 5 live

12-year-old Amelia Thompson has been invited to the royal wedding - she survived the Manchester Arena attack last year.

Amelia had two tickets, and gave one of them to Sharon Goodman, grandmother of Olivia Campbell-Hardy, who was killed in the attack.

Sharon said: "It's a privilege for Amelia to invite me - she's a very special young lady."

At the last minute, Amelia's mum Lisa was also given a ticket after a call from Kensington Palace.

Hanna Yusuf
in Windsor

Grace Gothard from London is “so happy” to celebrate Harry and Meghan’s wedding.

“Everybody here is so happy, it’s great.”

She left the capital at around 03:00 BST this morning.

“I look forward to seeing them here and waving, and saying ‘hello Meghan!’”

Ms Gothard, who was carrying the Ghanaian flag on her shoulders, offered the royal bride-to-be some advice.

“Continue to be yourself! Don’t change for anyone,” she said.

BBC Radio 2

Clare Balding gave Radio 2's Breakfast Show her prediction on what Meghan’s dress will look like.

She's guessing the dress will be white, because of the choice of flowers in the chapel, wild flowers in the hair - and a long train.. maybe.

She sounds more excited about the "beautiful" Windsor Grey horses though. She actually know their names!

BBC Radio 5 live

Tianna and Amelia are cousins, they're both 10.

They're on The Long Walk and have been there since 04:00 - Amelia told 5 live's Nihal Arthanayake, "I had to be dragged out of bed!"

They're really excited about the wedding. Amelia said: "Meghan's really inspiring to young girls."

And even more cousins - Roxy and Lola are seven-year-old cousins from Birmingham! They've been in position all night with their mums Charlotte and Louise.

"We had to give our coats over at about 02:00 this morning to keep the girls warm, but it's warming up now, we'll be fine."

Prince Harry's uncle, Earl Spencer, and his wife, Countess Spencer, have arrived to take their seats for the ceremony.

BBC News' Kirsty Young commented that he was looking "happy, relaxed and terribly proud".

Countess Spencer was praised by commentators for her elegant aubergine hat.

They're out in force in Windsor...

Image source, PA

Image source, Reuters

Image source, PA

Guests are now arriving at the chapel.

Actor Idris Elba and American talk show host Oprah Winfrey, just behind him in the picture above, were among the first on the scene.

We've also just caught a glimpse of James Blunt.