Queen Elizabeth II's platinum jubilee celebrations are under way with Trooping the Colour, a military parade watched by members of the royal family.
But, more importantly, who wore what on the day?
The queen was dressed in a summery shade of light blue at the Buckingham Palace event. Her coat had white detailing and, true to form, the monarch accessorised her ensemble with a hat of the same shade. She watched proceedings with her cousin the Duke of Kent.
Kate, Duchess of Cambridge, chose a white dress coat, thought to be by British design house Alexander McQueen, with a black and white Philip Treacy hat, a pair of sapphire earrings that belonged to Diana, Princess of Wales and a clutch bag by Scottish brand Strathberry.
Future queen consort, Camilla, Duchess of Cornwall, wore a striped blue dress coat with a light blue wide-brimmed hat.
The duchesses arrived at the Horse Guards Parade together in a carriage with Kate's children, Prince George, 8, Princess Charlotte, 7, and Prince Louis, 4.
Prince George wore a suit, befitting the occasion, while Princess Charlotte wore a blue dress with a blue bow, and Prince Louis wore a sailor-style shirt.
The Duke and Duchess of Sussex watched the proceedings from the Major General’s Office, with other members of the royal family.
Meghan wore an off-the-shoulder navy blue dress thought to be by Roland Mouret, with a wide-brimmed white hat with a navy bow by milliner Stephen Jones.
Sophie, Countess of Wessex, travelled in a carriage with her husband Prince Edward, Earl of Wessex, who was wearing military uniform, and children James, Viscount Severn, 14, and Lady Louise Windsor, 18.
The countess wore a pink gingham dress coat with a matching hat.
The queen's granddaughter Princess Eugenie watched the festivities from a London rooftop with her husband, Jack Brooksbank, and son, August, 1.
She shared a collection of photos on her Instagram, describing it as "the most perfect day to celebrate 70 years".
She was wearing a light blue chiffon and lace dress by Self-Portrait, with a coffee-coloured hat.
Prince Charles, Prince William and Princess Anne all took part in the parade, wearing military uniform.
What is Trooping the Colour?
Taking place at the Horse Guards Parade, a ceremonial ground in St James's Park, Trooping the Colour is an annual military parade, held to mark the British monarch's official birthday.
It has been the traditional celebration for British kings and queens for more than 260 years.
See highlights from day one of the platinum jubilee celebrations:
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Britain's Queen Elizabeth II leads the lighting of the principal jubilee beacon, part of the platinum jubilee celebrations, at Windsor Castle. Reuters -
Fireworks explode above Blackpool Tower to celebrate the jubilee. Reuters -
The 'Tree Of Trees' by designer Thomas Heatherwick at a special ceremony for the lighting of the principal beacon at Buckingham Palace, London. AFP -
Thousands wait for the royal family to appear on the balcony of Buckingham Palace, on the first day of celebrations to mark Queen Elizabeth II's platinum jubilee. AP -
The Trooping the Colour ceremony is carried out at Horse Guards, London. AP -
French President Emmanuel Macron stands next to British ambassador to France Menna Rawlings, after rekindling the flame under the Arc de Triomphe in Paris to mark the British queen's platinum jubilee. Reuters -
Francis Mwangi, 13, uses an Oculus virtual reality headset to visit Buckingham Palace virtually during platinum jubilee celebrations in Nyeri, Kenya. Reuters -
The Red Arrows perform a flypast over the Horse Guards parade, London. Trooping The Colour is a military ceremony performed by regiments of the British Army. It has taken place since the mid-17th century. Getty Images -
Prince Louis holds his ears as he stands next to Queen Elizabeth, his mother Catherine, Duchess of Cambridge, Princess Charlotte and Prince George to watch a special flypast from the Buckingham Palace balcony. AFP -
Crowds gather to watch a flypast by the Red Arrows during Queen Elizabeth's platinum jubilee celebrations. EPA -
Royal fans wear Queen Elizabeth masks during jubilee celebrations. EPA -
Camilla, Duchess of Cornwall, and Prince Charles greet royal well-wishers near Buckingham Palace. Bloomberg -
Spectators watch the RAF flypast on The Mall after the Trooping the Colour parade in London. Getty Images -
The RAF flypast on The Mall to mark the 70th anniversary of the accession of Queen Elizabeth II on February 6, 1952. Getty Images -
From left, the Duchess of Cornwall, the Prince of Wales , Queen Elizabeth II , the Duchess of Cambridge, Prince Louis, Princess Charlotte, Prince George, and the Duke of Cambridge, on the balcony of Buckingham Palace to view the RAF flypast on day one of the platinum jubilee celebrations. PA -
Members of the public fill The Mall ahead of a fly-past over Buckingham Palace during Trooping The Colour in London. Trooping The Colour, also known as The Queen's Birthday Parade, is a military ceremony performed by regiments of the British Army that has taken place since the mid-17th century. Getty Images -
Members of the Honourable Artillery Company perform a gun salute during celebrations to mark the platinum jubilee of Britain's Queen Elizabeth II, at the Tower of London. Reuters -
The Royal Gun Salute in Cardiff to mark the start of the platinum jubilee weekend. AP -
Queen Elizabeth II watches from the balcony during Trooping the Colour at Horse Guards Parade, central London, on day one of the platinum jubilee weekend celebrations. PA -
Prince Charles being driven to the parade. Getty -
Camilla, Duchess of Cornwall, with Catherine, Duchess of Cambridge at the Trooping the Colour parade. Getty -
Police officers intervene as protesters try to disrupt the ceremony during the queen's platinum Jubilee celebrations on The Mall in London. Reuters -
The Mall is packed for the wekeend's celebrations. PA -
The Kings Troop of the Royal Horse Artillery ride down The Mall on their way to fire the ceremonial gun. AP -
(L-R) Prince George of Cambridge, Prince Louis of Cambridge and Princess Charlotte of Cambridge travel in a horse-drawn carriage during Trooping The Colour. Getty -
An Irish wolfhound leads as soldiers march along The Mall. AP -
Prince Edward and his wife Sophie, Countess of Wessex ride in a carriage as the Royal Procession leaves Buckingham Palace for the Trooping the Color ceremony. AP -
The BT tower in central London bears a message to Queen Elizabeth II. AFP -
The 206 Battery of the Royal Artillery, the Ulster Gunners, fire a midday commemorative gun salute in honour of the beginning of the queen's platinum jubilee celebrations, at Hillsborough Castle, Northern Ireland. Reuters -
Sydney Harbour Bridge is illuminated in 'Royal Purple' to mark the 70th anniversary of the coronation of Queen Elizabeth II. AP -
The 105th Regiment Royal Artillery, The Scottish and Ulster Gunners during the royal gun salute at Edinburgh Castle. PA -
Marching in Horse Guards Parade, central London. Getty -
People gather at The Mall in London to celebrate Queen Elizabeth II's platinum jubilee. Reuters -
Camilla, Duchess of Cornwall, is driven along The Mall. Huge crowds are expected in the city as the UK marks the jubilee. AFP -
The Band of the Welsh Guards make their way to the Trooping the Colour event in London. AP -
The platinum jubilee marks the 70th anniversary of the queen taking the throne. Reuters -
Jubilant crowds in London. Reuters -
A Buckingham Palace staff member cleans the balcony where the queen is expected to wave to well-wishers. AFP -
A man walks his corgis Chuckles and Bunting down The Mall during the celebrations. Reuters -
Police officers cycle down The Mall. Reuters -
The Royal Regiment of New Zealand Artillery fires field guns at Point Jerningham, to mark the 70th anniversary of the coronation of Queen Elizabeth II, in Wellington, New Zealand. AP -
The official platinum jubilee portrait of Queen Elizabeth, taken at Windsor Castle recently. Photo: Buckingham Palace -
Larry the Cat, Chief Mouser to the Cabinet Office, sits outside Downing Street, London, adorned in bunting before the platinum jubilee celebrations, in London. AP -
A look-alike of Queen Elizabeth waves at people in London. The queen's platinum jubilee will be celebrated from June 2 to June 5 to mark the 70th anniversary of her accession to the throne on February 6, 1952. EPA -
People walk along The Mall in London, before the start of the Queen's platinum jubilee weekend. AP -
Joseph Afrane, 58, originally from Ghana, lives in Battersea, London, and is planning to attend all the official platinum jubilee events. PA -
Twins Linda Whitfield and Janice Jones, 59, from County Durham, are camping on The Mall to ensure they have a good view of the celebrations. PA -
Members of the public walk through Piccadilly Circus before the platinum jubilee celebrations for Queen Elizabeth. AFP
