The Queen will turn 90 this month and the longest-serving monarch is said to be excited by the prospect of 10,000 guests joining in as she marks the milestone.
On her actual birthday, Her Majesty will mark the occasion by undertaking two engagements in Windsor with her husband, the Duke of Edinburgh. She will meet locals and well-wishers during a walkabout in the town, after unveiling a plaque marking The Queen's Walkway at the foot of Castle Hill.
In the evening the Queen and Prince Philip will be accompanied by Duchess of Cornwall at a beacon lighting ceremony.
Queen Elizabeth will mark the milestone later this month
In June the Queen's Birthday Parade will take place at St Paul's Cathedral, and Her Majesty will be joined by Duke of Edinburgh, the Duke and Duchess of Cambridge, Prince Harry.
The festivities will culminate on the 12 June and communities all over the UK will be encouraged to throw street parties in the Queen's honour.
Last month, Prime Minister David Cameron announced that pubs across London will be able to stay open later in order to celebrate the Queen's milestone.
Her Majesty will be joined by family including the Duchess of Cambridge
Pubs that are normally licensed to trade until 11 in the evening will be able to stay open an extra two hours on 10 and 11 June.
Although it will be an active few months for the Queen, during her Christmas speech last year she revealed she was "looking forward to a busy 2016."
She said: "I am looking forward to a busy 2016, though I may have been warned I may have happy birthday sung to me more than once or twice."