Hanna Yusuf

The weather in Windsor is every bride-to-be’s dream.

The crisp morning is slowly turning into a warm summer day.

If the build-up to the wedding saw some of the worst things that could happen to a bride - notably the father of the bride’s heart attack - the actual day is going without a glitch.

All the screens, which were erected a few days ago, have been turned on and show celebrity guests arriving at St George’s Chapel.

Police seem alert, calm and under control.

The energised crowds break in to applause every now and then, using any opportunity - such as police walking by, or the arrival of George and Amal Clooney - to clap and cheer.

Children with Union Jack hats run around parents who are keeping an eye on the screens, while chatting away excitedly.

Amid the search for a “good spot” and the waving of good flags, lots of selfies are being taken on smart phones.

There is a tangible excitement in the atmosphere. Well-wishers - young and old - are united in their shared giddiness.

Prince Harry, in full military uniform, has arrived at St George's Chapel.

His brother and best man the Duke of Cambridge is accompanying him on the short walk from the car to the chapel.

Princesses Beatrice and Eugenie have taken their seats in the chapel, as has the Princess Royal.

The sisters are wearing slightly more low-key hats than they did at the wedding of the Duke and Duchess of Cambridge.

Image source, Reuters

Jo Elvin, who is sitting with the BBC News team, has described what little we have seen of the dress, through a car window, as "very romantic... much more demure than I was expecting".

She observed that the dress appeared to have a boat neckline and said the bride's hair looked to be in a low bun.

Most of the guests have arrived and Meghan Markle is on her way - the countdown is on.

Meghan Markle is to process alone along the aisle, says the BBC's Huw Edwards.

When she gets to the Quire section, she will be joined by Prince Charles, who will accompany her as she approaches Prince Harry.

There's a "feast of music" in the chapel, says Huw Edwards, adding that there is a "very English flavour" to the orchestral music currently being played by musicians from the BBC National Orchestra of Wales, the English Chamber Orchestra and the Philharmonia Orchestra.

Six-year-old Carys Jayawardena in Bedlinog, South Wales, wishes Prince Harry and Meghan "a very happy and long life together".

Are you having a Royal Wedding party? Share your day with us.

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

Image source, Victoria Watkins

More than 24,000 passengers have travelled between London Waterloo and Windsor this morning.

So far, so good...

Margaret Ryan
BBC News

My daughter Isabella, 13, is glad she didn’t camp out - as she’s getting a bit bored - but she still thinks it will be worth it.

“It’s not every day you get to see a prince,” she says.

Her 10-year-old sister Francesca isn’t worried about missing out.

She’s already made a deal with the woman who came early to squeeze in to the barrier when the royals come past.

And their cousin Lucy, nine, has the right idea about how to keep the crowd friendly...

Meghan Markle has left Cliveden House Hotel accompanied by her mother Doria Ragland.

A glimpse of the bride in the Rolls Royce Phantom revealed she is wearing a veil and tiara.

David and Victoria Beckham, as well as George and Amal Clooney, have arrived at Windsor for the royal wedding.

Meghan has given up her acting career - but not the friends she made during it.

Her Suits co-star Patrick J Adams - who played her on-screen husband - has been spotted as has Gabriel Macht, who plays Harvey Specter in the US sitcom.

We've just seen Sarah Ferguson arrive at the chapel - her daughters Beatrice and Eugenie are expected to arrive later.

She gave Jack Brooksbank - Eugenie's fiance - a big hug.

She was followed by Sir John Major and his wife Norma.

BBC Radio 5 live

Gemma Cairney is watching the VIPs going into St George’s Chapel.

She said when the Clooneys arrived "it was like a glossy Hollywood moment."

Gemma thinks Amal is leading the fashion stakes so far: "Amal looked like a sunflower, a human gorgeous sunflower with George on her arm - the ultimate silver fox in a matching suit."

Image source, PA

Gemma said: "There’s something about this wedding, there’s a bit of glitz, and I feel like some of the rules have been thrown out of the window."

Click here to listen to Gemma and the 5 live team.

Image source, PA

James Corden, now a major star in both the UK and US, is also among the guests gathering at St George's Chapel.

He and his wife, Julia, are also rumoured to be attending the evening reception later.

Margaret Ryan
BBC News

On the Long Walk it’s a sea of red, white and blue in the sunshine. Now and again a cheer goes up as a line of police officers walk up to take their places on duty or when the crowd sees the Long Walk on the big screens.

Someone’s trying to get a Mexican wave going but it’s not taking off yet.

The biggest queues are for the coffee stalls and Pimms bus but everyone’s sharing stories about how far they’ve come, from as far apart as Texas to Teddington.

Three friends have come from County Durham to claim their spot and to catch a glimpse of the happy couple.

Elizabeth Cranston, 70, said: “We came for the atmosphere. We love the royal family.”

Her friend Ann Hood said of Meghan: “She’s a breath of fresh air.”

For Susanne McNally it’s all about the royal couple. She said: “You can see they are so in love.”

Meanwhile the coffee queue isn’t moving very far. Maybe the line for the cocktails would have been a better bet...

Sir Elton John and his husband David Furnish have arrived at the wedding.

It had long been rumoured that the singer would attend after he cancelled some of the final dates of his residency in Las Vegas, which would have clashed with the big day.

The question is, will he perform at the reception...?

We've compiled a picture gallery with some of the pictures of the day so far - take a look!

Rugby star Jonny Wilkinson has arrived at the wedding, with his pregnant wife, Shelley.

Also in attendance at the service is his former coach, Sir Clive Woodward.