Her Majesty The Queen will mark the 800th anniversary of the Magna Carta at the site in Runnymede where the historic document was sealed.
Accompanied by HRH The Duke of Edinburgh, Her Majesty will attend a commemoration event at Runnymede Meadows on 15 June.
The Duke of Cambridge, The Princess Royal and Vice Admiral Sir Tim Laurence will also be present.
Details of the event, which is being organised by Surrey County Council and the National Trust, are being finalised.
It is expected to include speeches, music and art together with a rededication of the American Bar Association’s Magna Carta Memorial.
Surrey County Council Cabinet Member for Community Services Helyn Clack said: “This anniversary will be an occasion of immense local, national and international importance so it is fitting that The Queen and other members of The Royal Family will help to celebrate it in the county that gave Magna Carta to the world.
“It will be a delight and honour to welcome them all to the site where history was made 800 years ago and I have no doubt that they will ensure the Runnymede event will be the jewel in the crown of the celebrations here and across the globe.”
Sealed by King John at Runnymede in 1215, Magna Carta is considered one of the first steps towards modern democracy.
The Queen is patron of the Magna Carta Trust for the 800th anniversary of the sealing of Magna Carta.