The Queen is marking a record 70 years of service this year, with the nation set to join in celebrating her Platinum Jubilee.
From pop concerts to church services, community events and more, the royal celebrations are ongoing throughout the year, with a focus on a huge Platinum Jubilee weekend celebration in June.
Here's everything you need to know about the Queen's Platinum Jubilee, from when it is to what's happening and who's involved.
Watch: The Queen's Platinum Jubilee - What is Accession Day?
When is the Queen's Platinum Jubilee?
The Queen became the first British monarch to celebrate a Platinum Jubilee on 6 February this year, marking 70 years of service.
Events to mark the milestone occasion are taking place throughout the year but the main celebration is a four-day bank holiday weekend from Thursday, 2 June to Sunday, 5 June.
The four days of celebration include the Trooping of Colour in London, a star-studded pop concert outside Buckingham Palace, as well as other celebratory events and initiatives throughout the year.
Some of the key events will be attended by the Queen and members of the Royal Family, while some are open to the public, and many will be televised as the nation is encouraged to get involved.
When is Trooping the Colour and which royals are taking part?
The Queen’s Birthday Parade, known as Trooping the Colour, takes place on Thursday, 2 June and will bring together more than 1,400 parading soldiers, 200 horses and 400 musicians.
The parade, which will be broadcast live on television, will start at Buckingham Palace, then move down The Mall to Horse Guards Parade, joined by members of the Royal Family on horseback and in carriages.
It will close with a six-minute flypast of more than 70 aircraft from the Royal Navy, the Army and Royal Air Force, watching by the Queen and members of the Royal Family from the Buckingham Palace balcony.
The Queen has limited the Trooping The Colour balcony appearance to working members of the Royal Family, meaning the Duke of York and the Duke and Duchess of Sussex will miss out.
She will be joined by the Prince of Wales, the Duchess of Cornwall, the Duke and Duchess of Cambridge, the Earl and Countess of Wessex, the Princess Royal, the Duke and Duchess of Gloucester, the Duke of Kent, Princess Alexandra, and Vice Admiral Sir Tim Laurence.
Also set to appear for the historic occasion will be Prince George, Princess Charlotte and Prince Louis and the Wessexes’ children Lady Louise Windsor and James, Viscount Severn.
Although they will not be on the balcony, Harry, Meghan and their children will attend the celebrations, but it is not known which elements of the four-day jubilee weekend they will make an appearance at.
Watch: Who's missing out on Trooping of the Colour
When is the Jubilee Service of Thanksgiving?
A national service of thanksgiving will take place on Friday, 3 June, the second day of the extended Bank Holiday weekend making the Queen's 70-year reign.
Taking place at St Paul's Cathedral, it will be attended by a large number of members of the Royal Family with Harry, Meghan and Andrew potentially among those attending.
One of the country’s largest bells, the Great Paul, will be rung during the service — the first time it will have been heard at a royal occasion.
The event will also feature a new anthem by Judith Weir, master of the Queen’s music, that sets to music words from the third chapter of the Book of Proverbs, and there will also be bible readings, hymns and prayers to express thankfulness for the Queen’s reign, faith and service.
Some ceremonial elements will be changed for the service to ensure the Queen's comfort — including travelling by car rather than coach and entering by another entrance that shortens the distance to her seat.
The Dean of St Paul’s, the Very Reverend Dr David Ison, said: "It is a great honour to hold a service of thanksgiving for the reign of Her Majesty the Queen and to celebrate her 70 years of service to the UK and the Commonwealth."
A brand new exhibition at St Paul's will also document previous jubilee celebrations across three centuries.
Opening on 25 May, Jubilee: St Paul’s, The Monarch And The Changing World uses objects from the cathedral’s archive to tell the stories of royal jubilee celebrations spanning three centuries from King George III to the Queen’s Silver, Golden and Diamond Jubilees.
There will also be a community outreach music project, Choir for the Queen, which sees St Paul’s create dedicated learning resources to enable school children aged four-15 from across the UK and around the world to share a video singing their favourite hymn as a musical gift for the monarch.
Who is performing at the Platinum Party at the Palace?
Some of the world’s biggest stars will perform at Platinum Party at the Palace, a concert at Buckingham Palace to celebrate the most significant moments from the Queen’s reign, on Saturday, 4 June.
Hosted by Kirsty Young and Roman Kemp, the gig will feature performances from the likes of Queen + Adam Lambert, Alicia Keys, Nile Rodgers, Sir Elton John and Diana Ross.
The event will be held on a spectacular 360-degree stage surrounding the Queen Victoria Memorial in front of Buckingham Palace and be broadcast live on BBC One.
A further two stages – linked to the circular stage by a walkway – will be built in front of the palace railings.
Construction has already begun to create 15,000 standing spaces around the memorial, and 7,000 seated in the north and south stands.
Some 10,000 people have been allocated tickets in a public ballot, and a further 5,000 tickets have been set aside for key workers.
Others invited will include volunteers, representatives from the Royal Family’s patronages and nominated charity heroes.
Will the Queen attend the Epsom Derby 2022?
The Queen is a keen racing fan and is expected to attend the Epsom Derby. However, as with any jubilee event, the monarch's mobility issues could potentially prevent her.
The Derby will include a special tribute from the world of racing, with past and present jockeys who have ridden for the monarch forming a guard of honour on Saturday, 4 June.
Frankie Dettori and Willie Carson, who has ridden some of the Queen's most memorable winners, are expected to line part of the Epsom Derby course with up to 40 others when the Queen arrives.
The Jockey Club has previously announced that a few days before the derby, the Queen’s Stand at Epsom will be renamed the Queen Elizabeth II Stand in recognition of here contribution to horseracing and long association with the Derby.
When is the Big Jubilee Lunch?
The Big Lunch was an idea started in 2009 to encourage communities to celebrate their connections and get to know each other a little bit better, raising millions for local charities.
In 2012, a Big Jubilee Lunch took place to celebrate the Queen's Diamond Jubilee, with more than 8.5 million people taking part.
The event returns this year on Sunday, 5 June to mark the Platinum Jubilee, with millions expected to join in.
More than 200,000 local events will take place across the country, including screenings, street parties and lunches.
Big Jubilee Lunch themes being planned include red, white and blue and dancing through the decades with a world record attempt for the longest street party and the biggest Big Jubilee Lunch.
More than 600 Big Jubilee Lunches are also planned in more than 70 countries across the world, from Greenland to New Zealand.
What is the Jubilee Pageant?
The celebratory weekend in June will conclude with the Platinum Jubilee Pageant on Sunday, 5 June.
The pageant will involve thousands of performers from across the country and Commonwealth who will process down The Mall, telling the story of The Queen’s 70-year reign in a spectacular procession including interpretations of different chapters of her life by artists and communities.
The pageant will include a giant dragon puppet the size of a double decker bus, as well as corgis, acrobats, unicorns, dancers and circus acts.
Its grand finale will feature 150 ‘national treasures’ including Ed Sheeran who, along with members of the viewing public invited to become part of the performance, will gather and pay tribute to The Queen.