Queen Elizabeth’s Platinum Jubilee celebration is officially lit!

The 96-year-old monarch kicked off her four-day celebration with Trooping the Colour on Thursday morning. And she’s ending the day with a special dual beacon lighting ceremony withPrince William.

The Queen led the lighting of the Principal Platinum Jubilee Beacon from Windsor Castle, while her grandson William represented her at Buckingham Palace, where the beacon was officially lit.

With a symbolic touch of the Commonwealth Globe of Nations, which was placed on a podium, the Queen set off a chain of lights leading to the Principal Beacon outside Buckingham Palace.

The beacon takes the form of a sculpture dubbed the “Tree of Trees,” which stands 70 ft. tall in honor of the Queen and her astonishing 70 years on the throne. Around3,000 beacons, including fires and gaslit torches, will be lit around the U.K. at the same time.

Queen Elizabeth at the beacon lighting ceremony.ADRIAN DENNIS/getty

Britain’s Queen Elizabeth II touches the Commonwealth Nations Globe to start the lighting of the Principal Beacon outside of Buckingham Palace in London, from the Quadrangle at Windsor Castle in Windsor, west of London, on June 2, 2022, as part of Platinum Jubilee celebrations. - The queen will be seen again at Windsor Castle, west of London, as more than 2,800 beacons are lit at Buckingham Palace and across the UK, including atop the four highest peaks, as well as on the Channel Islands, the Isle of Man, and British Overseas Territories. Flaming tributes will be seen in 54 Commonwealth capitals across five continents, from Tonga and Samoa in the South Pacific to Belize in the Caribbean. (Photo by Adrian DENNIS / POOL / AFP) (Photo by ADRIAN DENNIS/POOL/AFP via Getty Images)

Prince William.Chris Jackson /getty

Britain’s Queen Elizabeth II touches the Commonwealth Nations Globe to start the lighting of the Principal Beacon outside of Buckingham Palace in London, from the Quadrangle at Windsor Castle in Windsor, west of London, on June 2, 2022, as part of Platinum Jubilee celebrations. - The queen will be seen again at Windsor Castle, west of London, as more than 2,800 beacons are lit at Buckingham Palace and across the UK, including atop the four highest peaks, as well as on the Channel Islands, the Isle of Man, and British Overseas Territories. Flaming tributes will be seen in 54 Commonwealth capitals across five continents, from Tonga and Samoa in the South Pacific to Belize in the Caribbean. (Photo by Adrian DENNIS / POOL / AFP) (Photo by ADRIAN DENNIS/POOL/AFP via Getty Images)

Peek says the number of beacons across the country has easily surpassed his target of 1,500. Beacons are also being lit across the Commonwealth — from Tonga to India and Rwanda.

“She’s our country, our nation, and our Commonwealth, and I believe she’s the person that everybody really looks up to,” Peek, 70, told PEOPLE of how the Queen is viewed across the world. “She’s got such continuity.”

Queen Elizabeth.ADRIAN DENNIS/getty

Britain’s Queen Elizabeth II touches the Commonwealth Nations Globe to start the lighting of the Principal Beacon outside of Buckingham Palace in London, from the Quadrangle at Windsor Castle in Windsor, west of London, on June 2, 2022, as part of Platinum Jubilee celebrations. - The queen will be seen again at Windsor Castle, west of London, as more than 2,800 beacons are lit at Buckingham Palace and across the UK, including atop the four highest peaks, as well as on the Channel Islands, the Isle of Man, and British Overseas Territories. Flaming tributes will be seen in 54 Commonwealth capitals across five continents, from Tonga and Samoa in the South Pacific to Belize in the Caribbean. (Photo by Adrian DENNIS / POOL / AFP) (Photo by ADRIAN DENNIS/POOL/AFP via Getty Images)

“She’s just got that humility. She knows it’s not about her. She knows it’s about — this is my humble opinion — about her position and the responsibility she’s got. I mean, responsibility, even now at her age must be phenomenal,” he added.

Can’t get enough ofPEOPLE’s Royals coverage?Sign up for our free Royals newsletterto get the latest updates onKate Middleton,Meghan Markleand more!

Britain’s Queen Elizabeth II touches the Commonwealth Nations Globe to start the lighting of the Principal Beacon outside of Buckingham Palace in London, from the Quadrangle at Windsor Castle in Windsor, west of London, on June 2, 2022, as part of Platinum Jubilee celebrations. - The queen will be seen again at Windsor Castle, west of London, as more than 2,800 beacons are lit at Buckingham Palace and across the UK, including atop the four highest peaks, as well as on the Channel Islands, the Isle of Man, and British Overseas Territories. Flaming tributes will be seen in 54 Commonwealth capitals across five continents, from Tonga and Samoa in the South Pacific to Belize in the Caribbean. (Photo by Adrian DENNIS / POOL / AFP) (Photo by ADRIAN DENNIS/POOL/AFP via Getty Images)

For more on the Queen’s Platinum Jubilee, listen below to our daily podcast PEOPLE Every Day.

“The one thing about beacons is that you can bring people of all ages, all nationalities, all religions — it doesn’t matter who you are you can bring them together at one moment in time to celebrate an important anniversary,” Peek said. “That’s why they’ve always been successful in Jubilees.”

After a busy day of outings, the Queen announced that she will not be attending Friday’s National Service of Thanksgiving at St. Paul’s Cathedral.

Britain’s Queen Elizabeth II touches the Commonwealth Nations Globe to start the lighting of the Principal Beacon outside of Buckingham Palace in London, from the Quadrangle at Windsor Castle in Windsor, west of London, on June 2, 2022, as part of Platinum Jubilee celebrations. - The queen will be seen again at Windsor Castle, west of London, as more than 2,800 beacons are lit at Buckingham Palace and across the UK, including atop the four highest peaks, as well as on the Channel Islands, the Isle of Man, and British Overseas Territories. Flaming tributes will be seen in 54 Commonwealth capitals across five continents, from Tonga and Samoa in the South Pacific to Belize in the Caribbean. (Photo by Adrian DENNIS / POOL / AFP) (Photo by ADRIAN DENNIS/POOL/AFP via Getty Images)

“The Queen greatly enjoyed today’s Birthday Parade and Flypast but did experience some discomfort,” a spokesperson for Buckingham Palace said on Thursday.

“Taking into account the journey and activity required to participate in tomorrow’s National Service of Thanksgiving at St Paul’s Cathedral, Her Majesty with great reluctance has concluded that she will not attend,” the statement continued.

Queen Elizabeth, Prince Louis, Kate Middleton, Princess Charlotte, Prince George and Prince William.Chris Jackson/Getty Images

Queen Elizabeth II, Prince Louis of Cambridge, Catherine, Duchess of Cambridge, Princess Charlotte of Cambridge, Prince George of Cambridge and Prince William, Duke of Cambridge watch the RAF flypast on the balcony of Buckingham Palace during the Trooping the Colour parade

“The Queen is looking forward to participating in tonight’s Beacon lighting event at Windsor Castle and would like to thank all those who made today such a memorable occasion.”

The Queen has been experiencing mobility issues in recent months and finds it difficult to stand for long periods. She has been using a walking cane and even complained about mobility problems, joking during an in-person meeting: “Well, as you can see, I can’t move!”

source: people.com