On horseback, Princess Anne, Colonel of The Blues and Royals, was seen today at Trooping the Colour where she is wearing the Full Mounted Ceremonial uniform of the Blues and Royals.

She donned her military uniform as she joined other members of the Royal Family in celebrating her brother's second Trooping the Colour - held every year as an official birthday event for the monarch.

Sarah Campbell
BBC Royal Correspondent

Image source, Sgt Donald C Todd (RLC)

There are 242 horses on parade today including three of those who were on the loose in central London in April after being spooked and bolting. Those pictures made global headlines.

Since then, Army vets and the Horse Trust have nurtured them back to good health and for the last few weeks they have been in London getting used to the sights and sounds of the city. Today they are back at work.

Tennyson, pictured above, was part of the Sovereign’s Escort. Vanquish and Trojan are also on parade.

The other two - Quaker and Vida, the grey which was seen covered in blood - continue their recovery in fields in the Chilterns. Both are being looked after by the Horse Trust.

We're now just seeing the first images of the Princess of Wales taking in the spectacle of today's ceremony.

Catherine is taking in the Trooping the Colour ceremony from the Duke of Wellington’s former office with her children, who have not been far from her side throughout today's events.

The slow troop ended a short time ago, but we are now seeing the troops go in quick march - a pace that's measured at 116 paces to the minute.

Stay with us as we follow along.

As we've been reporting, the Princess of Wales is making her first public appearance since Christmas, at the annual Trooping the Colour parade.

She was at the window of the Glass State Coach with her children, Prince George, Prince Louis and Princess Charlotte.

Watch the video clip below.

Image source, Trooping the Colour 2024/BBC Studios

As we mentioned earlier, this year the Irish Guards have taken a leading role with Trooping the Colour.

Speaking on BBC One's Trooping the Colour 2024 programme, Sgt Michael Flood says the regiment is "unique", with members from the UK, Ireland and the Commonwealth.

"Once you're in the Irish Guards, we all are part of the family," he says.

Gdsm Colati Kitione is from Fiji, and says he is "really excited" to be taking part in Trooping the Colour.

"It's an honour and a privilege," he says.

With events underway, here are some of the highlights from this morning's royal procession.

Image source, PA Media

Image source, PA Media

Image source, PA Media

Image source, Getty Images

The main event - Trooping the Colour itself is now just beginning.

We'll shortly see a regimental flag "trooped" through the ranks of shoulders.

The Irish Guards will lead it this year so look our for their mascot - an Irish wolfhound.

A reminder that Catherine is the Colonel of the regiment and we have seen some glimpses of her within the last hour.

Stay with us as we bring you the latest.

As we mentioned earlier, Prime Minister Rishi Sunak is one of the thousands watching on as the pageantry begins in central London.

He's been spotted taking a picture on his phone during the parade, sitting next to his wife Akshata Murty.

Since Sunak called a summer general election last month, the monarchy has postponed any engagements "which may appear to divert attention or distract from the election campaign".

If you're wanting to follow more of our general election coverage, you can head over to our live blog here.

Sean Coughlan
BBC News royal correspondent, reporting from The Mall

Image source, Getty Images

How did the crowds on the Mall react to the appearance of the Princess of Wales and the King?

They did what all modern crowds do, they held up their mobile phones. It’s the modern salute to anything that happens.

They cheer too, but it’s not easy to shout or clap when you’re focused on getting the picture to send back to show you were there.

And competing with the applause were the loud chants of anti-monarchy protesters, in a group near Buckingham Palace.

Horses seemed to get jumpy at the big yellow protest flags too.

Image source, Reuters

As well as members of the Royal Family and Rishi Sunak, other important attendees will include three horses of the household cavalry which ran away and were injured after escaping through central London in April.

One of the horses – Tennyson – will be in the Sovereign’s Escort during the parade. The Army has said he will be ridden by the most experienced rider in the division.

Two of the other injured horses, Trojan and Vanquish, will provide the ceremonial guard for the official entrance to the Royal Palaces.

The two other horses that were injured are still being looking after by charity the Horse Trust.

A reminder of what happened here.

And as the clock strikes 11:00 BST, the royal procession begins.

King Charles salutes as he rides along in his carriage, while the national anthem plays.

Now his carriage moves through as he inspects the troops.

As the carriage portion of today's event is about to come to a close, we've just seen Prince Louis giving a little wave to the crowd as he and his family draw closer to Horse Guards Parade.

The 6-year-old prince is riding in a carriage with his mother, Catherine, and his siblings Prince George and Princess Charlotte.

Sean Coughlan
BBC News royal correspondent, reporting from The Mall

Image source, Getty Images

So there she is. Catherine, the Princess of Wales, appears at a carriage window, the first sighting of her at a public event since Christmas.

She’s in the Glass State Coach with her children and will appear later today on the Buckingham Palace balcony.

One of the most famous faces in the world is back at a royal event after some difficult months.

It’s a moment full of personal drama as well as public spectacle. It’s a fairytale carriage in a very real-life story.

The King appears before the crowds too, in a carriage rather than on horseback after his own cancer diagnosis.

Much has changed since they took this route on a much sunnier day a year ago.

Sarah Campbell
BBC Royal Correspondent, reporting from The Mall

Leading the royal procession and making sure everything runs like clockwork is Lt Col James Shaw - the Brigade Major.

He will be riding Sovereign's Shadow. Shadow is a fantastic horse he tells me - but has a problem with drain covers.

So although Lt Col Shaw is supposed to ride in a straight line - Shadow meanders down The Mall avoiding the drain covers.

Something to look out for…

We've just seen King Charles and Queen Camilla riding in their carriage as part of the royal procession.

Its sides are covered in glass, so they can easily be seen by the public.

Cheers can be heard from the crowd as they move past.

The Princess of Wales has once more been seen - this time in a carriage as part of the royal procession.

We first saw her just before 10:30 BST riding in a car ahead of this morning's events. As a reminder this is her first public appearance this year.

Her children, Prince George, Princess Charlotte and Prince Louis could also be seen in the carriage with her.

The royal carriages have just set off for this morning's events and you'll now be able to follow live by clicking Play above.

You can also watch on BBC One and BBC iPlayer.

Image source, PA Media

We've also just seen the first pictures of King Charles and Queen Camilla as the pair arrive at Buckingham Palace ahead of the Trooping the Colour ceremony at Horse Guards Parade.

Last year, the King inspected troops from horseback during the event, but this year, he will conduct the review seated in an Ascot landau carriage with Queen Camilla.

Image source, PA Media

The wet weather hasn't stopped the pomp and pageantry this morning.

We can see the Band of the Grenadier Guards out in force - they're currently playing music while marching towards Horse Guards Parade.

They'll be closely followed by the procession of royal cars behind them.